Adding Contribution Guideline for Amphion

[HarryHe11]

✨ Description:

Adding contribution guidelines, pull request template, and code of conduct.

🚧 Related Issues:

No related issues.

👨‍💻 Changes Proposed:

• [1] Add contribution guidelines (CONTRIBUTING.md)
• [2] Add pull request template (pull_request_template.md)
• [3] Add code of conduct (CODE_OF_CONDUCT.md)
• [4] Updated main README.md

🧑‍🤝‍🧑 Who can review?

@RMSnow @lmxue

🛠 TODO

No TODO.

✅ Checklist:

• Code has been reviewed
• Code complies with the project's code standards and best practices
• Code has passed all tests
• Code does not affect the normal use of existing features
• Code has been commented properly
• Documentation has been updated (if applicable)
• Demo/checkpoint has been attached (if applicable)

[RMSnow]

Nice work!

[HarryHe11]

Nice work!

Hi Xueyao, thank you so much for reviewing my pr. I've updated this pr according to your feedback, please check the latest commit!

[lmxue]

Thanks for your efforts. Please check the comment.

[HarryHe11]

Thanks for your efforts. Please check the comment.

Hi Liumeng, thank you so much for reviewing my pr. I've resolved your comments. Please check the latest commit!