add planner prompt

chore: Bump version from 0.1.0 to 0.2.0

chore: Align package version to 0.1.1 and add repository info

- Update version number in index.ts and package.json
- Add git repository information to package.json

docs: Improve model invocation examples in README

- Add separate example for gpt-4o model
- Format examples for better readability
- Split single paragraph into multiple for clarity