[Documentation]: Suggestion - enable https://pre-commit.ci/

[rkm]

What documentation issue are you reporting

Formatting

Issue

We already have a .pre-commit-config.yaml in the repo, but this is not run if contributors don't have pre-commit installed locally or if they submit a PR directly in GitHub.

We could add https://pre-commit.ci to the repo, which will ensure the checks are run on every PR. Any formatting changes will also be automatically committed back to the branch by the tool, which is handy.