Move to prek and pymarkdown #3369

Job	Run time
Cache identify	7s
Dependency	6s
Shellcheck	6s
Prepare	24s
Ruff check and force	10s
Check commit	31s
Process test coverage	0s
Run mypy	0s
Run pytest using Python ${{ matrix.python-version }}	0s
Build and publish Python 🐍 distributions 📦 to TestPyPI	-1s
Process test complexity	-1s
	1m 22s

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