WIP: Use ruff for PEP8 checks

[hagenw]

This uses ruff for PEP8 checking, which is much faster than flake8.

It requires pyproject.toml for it's configuration, which is also added here.
But I suggest to first make an extra pull request in which we switch to pyproject.toml as it now seems mayor enough and we can replace setup.cfg and setup.py by using it.

TODO:

• check if build Python package still looks ok
• editable builds as done with pip -e . still do require a setup.py, so we should check if we really need this

[frankenjoe]

This uses ruff for PEP8 checking, which is much faster than flake8.

How much faster is it? flake8 never seemed like a bottleneck to me.

[frankenjoe]

But I suggest to first make an extra pull request in which we switch to pyproject.toml as it now seems mayor enough and we can replace setup.cfg and setup.py by using it.

Yes, makes sense.

[hagenw]

This uses ruff for PEP8 checking, which is much faster than flake8.

How much faster is it? flake8 never seemed like a bottleneck to me.

(from https://github.com/charliermarsh/ruff)

Now that we use pre-commit to check for flake8 you have a slight delay every time you do a commit. For most of our projects you do not feel this, but for larger ones like audformat there is a small delay.

[hagenw]

Closing in favor of #383