Ruff format

[jstucke]

• updated ruff version and rules
• replaced black with ruff
• checked, fixed and reformatted code with new ruff version

resolves #1187

[jstucke]

Do we want to add any new rules?
Do we still need .github/workflows/lint_action.yml if we have ruff?
Was there a reason why "I" (=isort) was not enabled?

[maringuu]

Do not wonder, I prettified the history a bit :)