PR: Setup pre-commit and format all code with Black

[Czaki]

This PR setup pre commit with following hooks:

• black - code formatter
• ruff - statical code linter. Extremely fast, under active development that increases the number of rules. May need to revisit the list of rules to see if my selection (copied from napari) is ok. Here is a list of rules: https://beta.ruff.rs/docs/rules/ (selection is not full, ass we do not revisit it in napari for a long time). Main downside is that when pre-commit.ci makes PR with an update (set to monthly interval), there may be a need to introduce some fixes/blacklist some rules.
• check-jsonschema check github workflows
• setup-cfg-fmt - setup.cfg formatter
• pre-commit/pre-commit-hooks - set of simple check for common simple mistakes like mixed line endings, validation json, yaml and toml for proper syntax (but not schema).

closes #345

[Czaki]

@dalthviz I think that best option for smooth experience is to setup pre-commit.ci on this repository.
Thom napari experience it provides nice autofix features if possible.

[dalthviz]

Thank you so much for the help here @Czaki ! I think using pre-commit.ci makes sense 👍 I believe, probably after this get merged, that to enable it we just need to follow the web setup, right?

[ccordoba12]

Thanks for giving us a hand with this @Czaki!

One important thing to mention is that I think all changes in this PR should be squashed in a single commit and when everything is ready for merge, that commit should be added to .git-blame-ignore-revs, so we can still rely on git blame after this.

[Czaki]

Squased. I hope that all imports that I removed by mistake are found.

[dalthviz]

Thanks for all the work @Czaki ! I left some comments regarding the new contribution guide pre-commit entry, and some code comments which seems like either need to be removed now or due to imports changing order need to be moved along side the new place the imports is.

Besides that I noticed a removed PySide6 import inside a test that maybe could be worthy to check locally but other than that this LGTM 👍 Again thank you so much for helping us with this!

[dalthviz]

Thanks @Czaki !