[Feature]: Use ruff to improve code style

[Nugine]

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

I see some small problems when I read through the codebase. It's easy to find out by a linter.

Describe the solution you'd like

Use ruff in github actions to enforce a unified code style.

pip install ruff
python -m ruff check **/*.py

[RMSnow]

Hi @Nugine, thanks for your insightful suggestions! We are now using Black to format the code. We will investigate ruff soon! (cc @Adorable-Qin)