Better packaging

0.7.1 (9/21/23)

• fix long-description for pypi

0.7.0 (9/21/23)

• better handling of propagation factor b
• add import boilerplate needed for Jupyterlite
• Makefile packaging for Jupyterlite file
• use version and other dunders
• flake8 now passes
• fix various docstrings
• readthedocs fixes
• ruff support
• add erbium fiber doc
• clean up notebooks
• add copyright stuff
• add .github actions
• update badges
• conda support