Add wf-inversion

Summary

Workflow for the followings spack packages:

• py-numpyro
• py-arviz
• py-graphviz
• py-vbjax

Package	wf-inversion and ^py-j‎axopt‎
Contact point	@adrianciu
KG entry

Checks

• Software Quality Checklist: SQ-Checklist.pdf (level: )
• Current maintainer is listed first in package.py
  • no account name
  • py-j‎axopt‎ has external maintainers
• No pinned dependency versions
• Post-installation tests are defined