Add pre-commit configuration to all templates

[Zethson]

At the moment we have Flake8 running in the linting workflow.

I would suggest to

1. Add pre-commit to the CI for all templates and remove flake8 from the linting workflow
2. Add a pre-commit setup with Black (120 lines!), flake8 and editorconfig check (https://github.com/editorconfig-checker/editorconfig-checker.python) and isort
3. Run pre-commit as a CI job for all templates
4. Document pre-commit in our documentation