Proposal: Add code formatting and pre-commit hooks to improve code consistency

[vegetablest]

Currently, the repository does not seem to have a consistent code style, and there is no formatter or pre-commit hook configured.
I’d like to propose adding automatic formatting and pre-commit checks to make contributions more consistent and reduce unnecessary diffs.

Plan:

Apply a standard formatter (ruff format);

Add a .pre-commit-config.yaml;

Run a one-time global format (large diff, no logic changes).

Impact:

Large diff initially, but improves maintainability long-term.

[vegetablest]

@tangyuanbo1 I can prepare a draft PR (no logic changes, only formatting and config setup). Would you be open to that?

[tangyuanbo1]

good idea！please do that @vegetablest