Migrate Python docs API names to snake case

[virtuald]

AI-generated, but I manually reviewed and spot checked some API. I told GPT to not check/update remote literal includes since I think there's already a tool for doing that?

Includes #3326 which did update some remote literal includes.

[sciencewhiz]

snake_case isn't in a robotpy release yet, right? Usually we'd wait to merge docs until there's a release

[sciencewhiz]

Is there a way to check how names actually got converted in robotpy? For example in this PR PIDController wasn't changed, but rightPID was changed to right_pid

[virtuald]

You can look at the pyi files in the wheels that were published for 2027.0.0a6.post4, or look at the latest documentation on readthedocs (for example https://robotpy.readthedocs.io/projects/robotpy/en/latest/wpimath/PIDController.html#wpimath.PIDController.set_p)

[sciencewhiz]

I got tripped up by the fact that only some things are snake_case, class names are not

[sciencewhiz]

There isn't really a python section in the changelog, but this is definitely important enough to be added to the changelog