switch from pylint to ruff

[hechth]

          We could also switch from `pylint` to `ruff` as we just also did for MS2DeepScore.

The workflow would need something like this:

      - name: Check style against standards using Ruff
        run: ruff check .

And we could add a config file ruff.toml or .ruff.toml, e.g. like this ruff.toml. In principle this should also work with something like tool.ruff in the existing toml-file.

Originally posted by @florian-huber in #22 (comment)