docs: add instructions for skipping pre-commit hooks in CONTRIBUTING.md

[TeckHack76]

Describe your change:

This PR updates the CONTRIBUTING.md file to include a section explaining how to skip pre-commit checks for exploratory or experimental changes using the --no-verify flag.

Note: This should only be used for local testing purposes. Final contributions must pass all pre-commit checks.

Closes #12732

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Add or change doctests?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one documentation file.

[yizhiakuya]

这是一个很好的文档更新，它可以帮助开发者在进行探索性编程时更有效率地工作。文档清晰说明了这种方法只应该用于本地测试，最终提交时仍需通过所有的预提交检查。