Enable linting with ruff

[alexfikl]

Adds linting with ruff and fixes all the issues.

xref: neurophysik/CHSPy#8

[alexfikl]

Hm, haven't managed to reproduce the failures locally neither with Python 3.12 or 3.13 with gcc or clang yet, so not quite sure what it doesn't like.

The only "functional" changes in here should be moving from np.random.random to np.random.Generator, so maybe it's just a random number issue.. Will have to look into it a bit more later.

[Wrzlprmft]

I re-ran the tests and it worked. This is a problem with tests using random numbers but no seeds, which is a bad idea for CI. For PyTest there is a module which does this very nicely, but I think for the current test structure, we need to set seeds manually. This definitely needs fixing, but it’s not related to this pull request.

[alexfikl]

I re-ran the tests and it worked. This is a problem with tests using random numbers but no seeds, which is a bad idea for CI. For PyTest there is a module which does this very nicely, but I think for the current test structure, we need to set seeds manually. This definitely needs fixing, but it’s not related to this pull request.

Yeah, agreed. I'll go ahead and make a little PR setting the seeds later today. Thanks for checking!