Add docstring checks to RUFF #218
Description
It would be great to activate the pydocstyle docstring "D" rules in Ruff, but Ruff currently doesn't support sphinx formatting for docstrings. There is an open ticket (astral-sh/ruff#6606) and if/when it gets merged we should add docstring checks.
An open issue is whether we want to require docstrings in the tests folder. I think it would be nice but given the sheer number of functions that need docstrings and the questionable utility it might not be worth it.