Add grayskull-generated jax-dataclasses recipe

[traversaro]

Grayskull-generated recipe for the pure python package jax-dataclasses. PyPi package: https://pypi.org/project/jax-dataclasses/ .

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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/jax-dataclasses) and found it was in an excellent condition.

[traversaro]

@conda-forge/help-python @conda-forge/staged-recipes The PR is ready for review, thanks! The Windows failure is expected as jax is not available on Windows, anyhow is not particularly problematic as this is a noarch: python recipe.

[diegoferigo]

It's worth noting that there are experimental CPU builds on Windows in upstream (jax-ml/jax#5795), but probably in conda-forge it's still missing. Unrelated to this PR though.

[traversaro]

Thanks @ocefpaf !