automatic checks on docstrings

[XzzX]

Following up my take docstrings violates DRY we should do our best to ensure our docstrings are correct.
First we should decide on a docstring style. From what I can see it is pretty much google style. So we should stick to it and enforce it as far as possible.
I propose adding pydoclint. It helps with:

• signature does not match docstring arguments
• type annotation do not match docstring type annotations
• and more

There will be no errors for undocumented functions. It only checks if the docstring follows the rules if there is a docstring.

Of course, we have to decide what we want to enforce. The list of configuration options can be found here:
https://jsh9.github.io/pydoclint/config_options.html

pydoclint is also currently in the process of being implemented in ruff. So in the future we might be able to just use ruff for it.

Since pydoclint reports a lot of findings we can think of adding a "baseline", i.e. ignoreing all current warnings and enforce it for future additions.

[XzzX]

Here is an exampl of the output https://github.com/pyiron/pyiron_workflow/actions/runs/13155911088/job/36712896087?pr=578