running pre-commit locally

[soumilbaldota]

BEGINRELEASENOTES

• Add instructions on how to run pre-commit locally to the documentation

ENDRELEASENOTES

[tmadlener]

Thanks for adding this. I have a few minor comments:

• I think the installation via pip is probably more widespread, as it is probably more widespread than pip (especially if you already have a python installation)
• Instead of pointing to the brew homepage, could you instead point to the pre-commit homepage (https://pre-commit.com/)? That effectively has all the installation and usage instructions on their landing page.
• There seem to be some whitespace issues that fail the pre-commit workflow. If you run that locally, I think it automatically fixes these (we have not enabled this in CI though).