Currently all setting changes require a restart to apply, so there's a
bit of commented out code that i implemented before i realized.
Still needs tooltips for each setting.
Added option email/no_username to disable username input on form, and
instead use the provided email address as the username. Also added
missing 'packaging' dep from pevious update.
setup.py has been removed, and Poetry is now used to package for
install. This fixed an issue i had with uploading to PyPI, so one can
now run 'pip install jellyfin-accounts' to install.
