docs: add contributing guide (Orillusion#126)

Including
- Code of Conduct
- Issue Reporting Guidelines
- Pull Request Guidelines
- Development Setup
- NPM Scripts
- Project Structure

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,128 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+[email protected].
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

.github/commit-convention.md

@@ -0,0 +1,91 @@
+## Git Commit Message Convention
+
+> This is adapted from [Angular's commit convention](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog-angular).
+
+#### TL;DR:
+
+Messages must be matched by the following regex:
+
+```js
+/^(revert: )?(feat|fix|docs|dx|style|refactor|perf|test|workflow|build|ci|chore|types|wip)(\(.+\))?: .{1,50}/
+```
+
+#### Examples
+
+Appears under "Features" header, `component` subheader:
+
+```
+feat(component): add new component xxx
+```
+
+Appears under "Bug Fixes" header, `component` subheader, with a link to issue #28:
+
+```
+fix(component): remove update lifecircle hook
+
+close #28
+```
+
+Appears under "Performance Improvements" header, and under "Breaking Changes" with the breaking change explanation:
+
+```
+perf: improve store getters performance by removing 'foo' option
+
+BREAKING CHANGE: The 'foo' option has been removed.
+```
+
+The following commit and commit `667ecc1` do not appear in the changelog if they are under the same release. If not, the revert commit appears under the "Reverts" header.
+
+```
+revert: feat(theme): add home page feature
+
+This reverts commit 667ecc1654a317a13331b17617d973392f415f02.
+```
+
+### Full Message Format
+
+A commit message consists of a **header**, **body** and **footer**. The header has a **type**, **scope** and **subject**:
+
+```
+<type>(<scope>): <subject>
+<BLANK LINE>
+<body>
+<BLANK LINE>
+<footer>
+```
+
+The **header** is mandatory and the **scope** of the header is optional.
+
+### Revert
+
+If the commit reverts a previous commit, it should begin with `revert: `, followed by the header of the reverted commit. In the body, it should say: `This reverts commit <hash>.`, where the hash is the SHA of the commit being reverted.
+
+### Type
+
+If the prefix is `feat`, `fix` or `perf`, it will appear in the changelog. However, if there is any [BREAKING CHANGE](#footer), the commit will always appear in the changelog.
+
+Other prefixes are up to your discretion. Suggested prefixes are `docs`, `chore`, `style`, `refactor`, and `test` for non-changelog related tasks.
+
+### Scope
+
+The scope could be anything specifying the place of the commit change. For example `theme`, `compiler`, `ssr`, etc...
+
+### Subject
+
+The subject contains a succinct description of the change:
+
+- use the imperative, present tense: "change" not "changed" nor "changes"
+- don't capitalize the first letter
+- no dot (.) at the end
+
+### Body
+
+Just as in the **subject**, use the imperative, present tense: "change" not "changed" nor "changes".
+The body should include the motivation for the change and contrast this with previous behavior.
+
+### Footer
+
+The footer should contain any information about **Breaking Changes** and is also the place to
+reference GitHub issues that this commit **Closes**.
+
+**Breaking Changes** should start with the word `BREAKING CHANGE:` with a space or two newlines. The rest of the commit message is then used for this.

.github/contributing.md

@@ -0,0 +1,147 @@
+# Orillusion Contributing Guide
+
+Hi! I'm really excited that you are interested in contributing to Orillusion. Before submitting your contribution, please make sure to take a moment and read through the following guidelines:
+
+- [Code of Conduct](./CODE_OF_CONDUCT.md)
+- [Issue Reporting Guidelines](#issue-reporting-guidelines)
+- [Pull Request Guidelines](#pull-request-guidelines)
+- [Development Setup](#development-setup)
+- [NPM Scripts](#scripts)
+- [Project Structure](#project-structure)
+
+## Issue Reporting Guidelines
+
+- Welcome to use [Github](https://github.com/Orillusion/orillusion/issues)  to report a issues, request a feature, or ask a question
+
+## Pull Request Guidelines
+
+- Don't directly send PR to `main` branch, unless it's a urgent bug fix/patch.
+
+- Checkout a feature branch from a dev based branch, e.g. `dev`, and merge back against that branch.
+
+- [Make sure to tick the "Allow edits from maintainers" box](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/working-with-forks/allowing-changes-to-a-pull-request-branch-created-from-a-fork). This allows us to directly make minor edits / refactors and saves a lot of time.
+
+- If adding a new feature:
+
+  - Add accompanying unit test or sample case.
+  - Provide a convincing reason to add this feature. Ideally, you should open a suggestion issue first and have it approved before working on it.
+
+- If fixing a bug:
+
+  - If you are resolving a special issue, add `(fix #xxxx[,#xxxx])` (#xxxx is the issue id) in your PR title for a better release log, e.g. `update entities encoding/decoding (fix #3899)`.
+  - Provide a detailed description of the bug in the PR. Live sample/demo preferred.
+
+- It's OK to have multiple small commits as you work on the PR - GitHub can automatically squash them before merging.
+
+- Make sure CI tests pass!
+
+- Commit messages must follow the [commit message convention](./commit-convention.md) so that changelogs can be automatically generated.
+
+## Development Setup
+
+[Node.js](https://nodejs.org) **version 16+**, and [PNPM](https://pnpm.io) **version 7+** is perferred.
+
+First, you need to clone/flok repo:
+
+```bash
+$ git clone [email protected]:Orillusion/orillusion.git
+$ cd orillusion
+$ git checkout dev # `dev` branch is perfered to start your development
+```
+
+If you need to run samples, you may need to init the `assets` submodule to load models, images and other resources:
+
+```bash
+$ git submodule update --init # init /public assets folder, it may take a long time due to large file size
+```
+
+After cloning the repo, run:
+
+```bash
+$ pnpm i # install dev and optional deps of the project
+$ pnpn i --no-optional # skip optional deps, install dev deps only if you don't need run ci tests
+```
+
+A high level overview of main tools used:
+
+- [TypeScript](https://www.typescriptlang.org/) as the development language
+- [Vite](https://vitejs.dev/) and [ESBuild](https://esbuild.github.io/) for development bundling
+- [Rollup](https://rollupjs.org) for production bundling
+- [Electron](https://www.electronjs.org/) for CI unit testing
+- [TypeDoc](https://typedoc.org/) for API docs generating
+
+## Scripts
+
+### Start a Dev server
+After install all dependenceies of the project, just run `pnpm run dev` to boot up a dev environment locally, with live relaod of the soure code.
+
+```bash
+$ pnpm run dev
+```
+After executing the above command, visit http://localhost:3000 and try live samples from `/samples`
+
+### Build production libs
+To build a production package:
+```bash
+$ pnpm run build
+```
+After executing the above command, the production libs (`orillusion.es.js` and `orillusion.umd.js`) will be generated in `dist` folder, along with all types `*.d.ts` in `dist/src` subfolder.
+
+### Unit Test
+To start an auto unit tests:
+```bash
+$ pnpm run test
+```
+This will start an electron window to run all tests in `test` folder. 
+
+If you need to test in a docker/linux enviroment without GPU drivers:
+```bash
+$ pnpm run test:ci
+```
+This will force Electron to use a CPU based software Vulkan driver to process all tests with WebGPU APIs
+
+### API docs
+To generate API docs:
+```bash
+$ pnpm run docs # generate all docs, including core and packages
+$ pnpm run docs:core # core docs only
+```
+All `md` docs will be generated in `docs` folder.
+
+## Project Structure
+
+A overview of project structure:
+
+```bash
+├─ 📂 node_modules/       # Dependencies
+│  ├─ 📁 @webgpu          # WebGPU types for TS
+│  └─ 📁 ...              # Other dependencies (TypeScript, Vite, etc.)
+├─ 📂 src/                # @orillusion/core source
+│  ├─ 📄 index.ts         # The entry root, export all modules from /src
+│  └─ 📁 ...              # The core source files in sub category
+├─ 📂 packages/           # @orillusion/xxx extensions
+│  ├─ 📁 ammo             # Archive for Ammo.js
+│  ├─ 📁 debug            # Internal debug lib based on dat.gui
+│  ├─ 📁 draco            # Archive for draco_decoder.js
+│  ├─ 📁 media-extention  # Media components for Orillusion
+│  ├─ 📁 physics          # physics component for Orillusion, powerd by Ammo.js
+│  └─ 📁 stats            # A simple performance stats component
+│  └─ 📁 ...              # Others
+├─ 📂 samples/            # Live samples
+│  ├─ 📄 index.ts         # A entry mune to hold all samples in /samples
+│  └─ 📁 ...              # Samples to test each sub category
+├─ 📂 test/               # Unit tests
+│  ├─ 📄 index.ts         # Entry mune to hold all tests in /test
+│  ├─ 📄 util.ts          # test libs
+│  ├─ 📁 ci               # main entry for electron
+│  └─ 📁 ...              # Unit tests in each sub category
+├─ 📄 .gitignore          # Ignore certain files in git repo
+├─ 📄 index.html          # Dev index page
+├─ 📄 LICENSE             # MIT
+├─ 📄 package.json        # Node package file
+├─ 📄 tsconfig.json       # TS configuration file
+├─ 📄 vite.config.js      # vite configuration file
+└─ 📄 README.md           # Read Me!
+```
+
+Welcome to submit PRs to extend `@orillusion` packages

README.md

@@ -108,6 +108,9 @@ Please read the [Docs](https://www.orillusion.com/guide/) to Learn More.
 - [Documentation](https://www.orillusion.com/guide/)
 - [Forum](https://forum.orillusion.com/)
 
+## Dev and Contribution
+Please make sure to read the [Contributing Guide](.github/contributing.md) before developing or making a pull request.
+
 ## License 
 
 Orillusion engine is released under the [MIT](https://opensource.org/licenses/MIT) license.