Pre-commit: Move codespell script to pre-commit

[akien-mga]

Makes it enabled by default in pre-commit hooks, which should help users catch typos.

Opening as a draft as I think this risks being a bother to users, as codespell can sometimes have false positives, and it won't let them commit before solving the false positive or adding it to the ignore list.

On the other hand I raised its quietness option, which means it no longer nags about potential issues that it spotted but refused to fix as those fixes are disabled by default (due to often being false positives). So the remaining "sure" fixes might not be too bad.

One option could be to add this but leave it opt-in, by using stage: [manual], so it doesn't actually run automatically on pre-commit hooks. It then needs to be run manually with pre-commit run codespell --hook-stage manual... seems a bit tedious too.

Another drawback to the approach in this PR is that we lose the PR diff annotations on GitHub, but I'm not sure how useful they were as they were not blocking, and we still introduced typos regardless.

Edit: This may be a nicer approach to set the file exclude and words ignore lists: https://github.com/codespell-project/codespell/blob/master/pyproject-codespell.precommit-toml

[akien-mga]

Superseded by #91597.