Use Poetry to manage python dependencies

[buehlefs]

Reasons:

• Poetry lock files can be used with multiple python versions
• Better NixOS support
• pyproject.toml can supersede setuptools and pipfile configuration
• Works well for MUSE4Anything

Tasks:

• add pyproject.toml with dependencies and update readme
• remove all pipenv and setuptools files
• update documentation build Add sphinx documentation build and publish to read the docs #32
• update install skript Update Install skript to use poetry #31
• update docker build Update docker container #33