Bundle up the linting-requirements in tox with the pre-commit hook

[pnkraemer]

Unify formatting, linting, and continuous integration.
There should only be one way of linting the code, not two (pre-commit and tox).

The likely solution would be to move all formatting and linting to the pre-commit hook and to call pre-commit run --all-files in the GitHub Action. It might also be time to move to Ruff instead of pylint+black+isort. Remember to update the developer guidelines.