Use ruff

[adamjstewart]

Summary

I'm starting to seriously consider using ruff to replace the following style tools we currently use:

• black
• flake8
• isort
• pydocstyle
• pyupgrade

It doesn't yet handle static type analysis (mypy), but the devs would like to

Rationale

A few reasons:

• It supports pyproject.toml, unlike flake8/pre-commit/pyupgrade
• Fewer dependencies to track and manage
• It's a single tool to run instead of multiple (although pre-commit slightly alleviates this)
• It's fast (only really matters for isort which contains a bug where gitignore is not ignored)
• My favorite style tool, pydocstyle, is now deprecated and contains known bugs
• It's rapidly gaining popularity, including recent adoption by PyTorch

Implementation

Easy to implement, only need to decide on the exact configuration details. Just curious to see how many files change and what new issues get flagged.

Alternatives

A lot of users have suggested this to me. I'm unaware of any popular alternatives.

Additional information

Only downside is that ruff is built in rust. This doesn't matter for pip/conda users, but rust is non-trivial to build from source. But kornia also requires rust now, so we can't really avoid that anyway. Seems like rust is the future of Python, and will become harder to avoid in the future.