Add ChoreoLib to robotpy-extras

[bryceroethel]

I'm not sure if this is the place to submit this type of request, let me know if there's a better channel to forward this to.

ChoreoLib is supporting python in 2025, and is available under the sleipnirgroup-choreolib package on PyPI.

[virtuald]

I think I'd like to get rid of the extra packages (robotpy/robotpy-installer#118), but if we keep it then we'll add this.