Update type annotations (ADHI-4964)

coldpie added correct type annotations so mypy can now check correctness of the coldpie calls.

Unfortunately LCG comes with mypy <1.0 which makes it hard to check against coldpie, so I keep coldpie ignored in mypy.ini.

Modernized type annotations. Added pre-commit hooks to run black/isort/ruff on committed files, plus few other standard checks.