[kowainik#14] Add PR template (kowainik#27)

Resolves kowainik#14

.github/pull_request_template.md

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+### Solutions for Chapter {NUMBER}
+
+cc @vrom911 @chshersh

CODE_OF_CONDUCT.md

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+# Code of Conduct
+
+This code of conduct outlines our expectations for all those who participate
+in the Kowainik organization.
+
+We invite all those who participate in Kowainik to help us create safe
+and positive experiences for everyone.
+
+## Our Standards
+
+A primary goal of Kowainik is to make the Haskell open source community friendlier.
+As such, we are committed to providing a friendly, safe and welcoming environment for all.
+So, we are using the following standards in our organization.
+
+### Be inclusive.
+
+We welcome and support people of all backgrounds and identities. This includes,
+but is not limited to members of any sexual orientation, gender identity and expression,
+race, ethnicity, culture, national origin, social and economic class, educational level,
+colour, immigration status, sex, age, size, family status, political belief, religion,
+and mental and physical ability.
+
+### Be respectful.
+
+We won't all agree all the time, but disagreement is no excuse for disrespectful behaviour.
+We will all experience frustration from time to time, but we cannot allow that frustration
+become personal attacks. An environment where people feel uncomfortable or threatened
+is not a productive or creative one.
+
+### Choose your words carefully.
+
+Always conduct yourself professionally. Be kind to others. Do not insult or put down others.
+Harassment and exclusionary behaviour aren't acceptable. This includes, but is not limited to:
+
+  * Threats of violence.
+  * Discriminatory language.
+  * Personal insults, especially those using racist or sexist terms.
+  * Advocating for, or encouraging, any of the above behaviours.
+
+### Don't harass.
+
+In general, if someone asks you to stop something, then stop. When we disagree, try to understand why.
+Differences of opinion and disagreements are mostly unavoidable. What is important is that we resolve
+disagreements and differing views constructively.
+
+### Make differences into strengths.
+
+Different people have different perspectives on issues,
+and that can be valuable for solving problems or generating new ideas. Being unable to understand why
+someone holds a viewpoint doesn’t mean that they’re wrong. Don’t forget that we all make mistakes,
+and blaming each other doesn’t get us anywhere.
+
+Instead, focus on resolving issues and learning from mistakes.
+
+##  Reporting Guidelines
+
+If you are subject to or witness unacceptable behaviour, or have any other concerns,
+please notify us as soon as possible.
+
+You can reach us via the following email address:
+
+ * [email protected]

README.md

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 # learn4haskell
 
-[![GitHub CI](https://github.com/kowainik/learn4haskell/workflows/CI/badge.svg)](https://github.com/kowainik/learn4haskell/actions)
-[![MPL-2.0 license](https://img.shields.io/badge/license-MPL--2.0-blue.svg)](LICENSE)
-
 ![Learn4Haskell](images/HacktoberFest2020-Learn4Haskell-Banner.png)
 
 Learn Haskell basics in 4 pull requests