[Improvement][API] Optimize API documentation for 3.x

[hunter-cloud09]

Search before asking

• [X] I had searched in the issues and found no similar feature requirement.

Description

Optimize the documentation, realize API group management and switch between Chinese and English. There is a detailed explanation for each interface

Are you willing to submit a PR?

• [ ] Yes I am willing to submit a PR!

Code of Conduct

• [X] I agree to follow this project's Code of Conduct

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[hkun0120]

怎么样才算是完成了这个任务呢？good first issue