Add recipe for pyribbit

[traversaro]

pyribbit started as a mantainance fork of abandoned pyrender package that is already in conda-forge, but then was converted to a completly different package with its own name and that can be installed side-by-side with pyrender to continue its development.

pyribbit repo: https://github.com/fishbotics/pyribbit .
pyribbit PyPI: https://pypi.org/project/pyribbit/ .

See mmatl/urdfpy#31 for more detail.

Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml".
• License file is packaged (see here for an example).
• Source is from official source.
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• Build number is 0.
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[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/pyribbit) and found it was in an excellent condition.

[traversaro]

@conda-forge/staged-recipes @conda-forge/help-python the recipe is ready for review, thanks! It is a classical recipe for a python package already on PyPI.