Move to ruff-formatter & update settings

[ItsDrike]

This replaces both isort and black with ruff's new tooling.

Ruff contained isort support for a while, however it was not entirely compatible with our custom isort rules before. Ruff has made some significant progress, which allows us to now completely replace isort with ruff's version of it. The advantage of doing this is obviously one less dependency, but additionally, ruff is also much fater than isort, and the import formatting can now happen during ruff check (linter run) through auto-fixes.

More recently (though it was a few months now), ruff has added support for an integrated code formatter, which is intended to replace black. In vast majority of it's formatting rules, it will be the same as black, so there are essentially no changes to the actual code after running ruff format. (other than some minor things, like to #fmt: off comments, which ruff handles slightly differently, where ruff will only ignore full statements, not individual lines, so these comments had to be moved around a bit, or changed to # fmt: skip on the appropriate statement).

This new formatter is much faster than black was, and integrates nicely with our existing ruff configuration.

Lastly, this PR also updates some of ruff's settings/options, as a lot of what we were doing is now deprecated in newer versions of rust (such as setting select rules in [tools.ruff] instead of [tools.ruff.lint]. Or using the --show-source CLI argument.

[ItsDrike]

Note: the failed CI is not related to this PR, it's failing to build readthedocs due to a import error for dns. This likely has to do with some package getting auto-updated and breaking compatibility or something like that.

[PerchunPak]

I like that it tries to maintain indentation for comment, honestly lacked this feature in black.