Add basic testing for Windows

[matthewfeickert]

Based off of the experience of Issue #2353, I was curious how much work it would take to add testing for Windows. The answer seems to be not much for Python 3.9+. For Python 3.8 this fails as there is no jaxlib for Python 3.8, but all the backends for Python 3.9+ support Windows wheels.

There's an additional caveat that many tests in tests/test_scripts.py currently fail on Windows, and so the passing screen shot runs with --ignore tests/test_scripts.py, but all the Python tests pass.

I don't think that we should add the testing to the normal CI that runs on every PR as this would slow things down a bit, so I would propose using

on:
  # Run daily at 1:23 UTC
  schedule:
  - cron:  '23 1 * * *'
  workflow_dispatch:

to have the Windows tests run as a nightly CRON job and then on deman with workflow dispatch (which is what I have in the passing tests above).

@kratsg @lukasheinrich what are your thoughts?