Use ruff format instead of Black, consolidate PyClean
- Introduces
ruff format, which replaces Black in the Tox config - Activate all ruff rules by default, ignore just a few
- Simplify
pycleancall in Tox config (ruff is now a default debris topic)
ruff format, which replaces Black in the Tox configpyclean call in Tox config (ruff is now a default debris topic)