pre-commit: introduce pre-commit and fix linters

[schuellerf]

not sure if the settings of those pre-commit checks/linters are perfect but this commit would be a start to avoid having the round-trip with failing github tests, hopefully

[mvo5]

A bit of a meta comment, would it make sense to introduce PRs with one linter at a time? That would probably make both the review and the commit history a bit easier to read :)

[schuellerf]

A bit of a meta comment, would it make sense to introduce PRs with one linter at a time? That would probably make both the review and the commit history a bit easier to read :)

Not sure if this would create an unnecessary high number of PRs - but the straight forward ones and ruff can be split, I guess🤔 😁

[mvo5]

A bit of a meta comment, would it make sense to introduce PRs with one linter at a time? That would probably make both the review and the commit history a bit easier to read :)

Not sure if this would create an unnecessary high number of PRs - but the straight forward ones and ruff can be split, I guess🤔 😁

Yeah, maybe it's just ruff that tripped me up here :)

[schuellerf]

@mvo5 autopep8 seems to be ok, fixing lines that are too long but keeping others… please check