CI: replace flake8-pyi with ruff

[twoertwein]

Not all rules are covered by ruff but, from my point of view, the important ones are covered.

[MarcoGorelli]

Thanks @twoertwein !

[twoertwein]

Slightly (un)-related: Ruff started to cover some of the autotyping parts. I would be fine replacing autotyping with ruff when ruff adds type annotations to int/float/str/... default parameters. I consider this rule "important" as it "gently encourages" people who add new arguments to also add type annotations.

[MarcoGorelli]

sounds good

did you try upgrading to the latest autotyping? I tried, but got lots of error I couldn't resolve (though admittedly I didn't spend that long on it)

[twoertwein]

did you try upgrading to the latest autotyping? I tried, but got lots of error I couldn't resolve (though admittedly I didn't spend that long on it)

I think these are triggered by the new --guess-common-names. I will go through them and see which ones are correct. But I think we probably have to exclude that option (or postpone until all incorrect guesses have correct annotations) .