[TASK] Add contributing and development details to repo

[jmakhack]

Task Context

Add CONTRIBUTING.md and contribution/development details to README

Some things to include in these docs:

• How to build the project for different operating systems
• How to test the code
• How to submit a pull request and merge any changes
• Expectations on code quality
• Code conventions
• Adding/Linking any third-party programs

[TBeeren]

https://github.com/jmakhack/myanimelist-cli/pull/23 😄