[FEATURE]: Enhance docstrings as Google style

[XuanYang-cn]

Is there an existing issue for this?

• [X] I have searched the existing issues

Is your feature request related to a problem? Please describe.

https://google.github.io/styleguide/pyguide.html

https://www.sphinx-doc.org/en/master/usage/extensions/napoleon.html?highlight=example#google-vs-numpy

https://www.sphinx-doc.org/en/master/usage/extensions/example_google.html

Describe the solution you'd like

No response

Describe alternatives you've considered

No response

Anything else?

No response

[XuanYang-cn]

/assign