Setup pre-commit and ruff #8391

Job	Run time
Run the Django test suite (main)	20m 11s
Run the Django test suite (elastic)	5m 42s
Build and check documentation	1m 53s
Run the Django test suite (openklant)	2m 31s
Run the Django test suite (sequential)	3m 58s
End-to-end tests, chromium	5m 8s
End-to-end tests, firefox	4m 6s
End-to-end tests, webkit	5m 33s
End-to-end tests, msedge	4m 22s
Check that documentation for configuration steps is up-to-date	0s
Build (and push) Docker image	1m 42s
Upload coverage information to codecov	17s
	55m 23s

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