Angreal

- Fixes command groups and flag arguments to function correctly
- additional documentation provided in core

Patched a bug where command groups were working as intended but were causing a duplicate registration event.

Integration to docker_pyo3 so you can interact with docker via the core library.

Original `venv_required` code was being executed on import which limited performance greatly.

The `venv_required` now does all of its path manipulations + package installation on call to the function instead.