Add setuptools, apply black formatting

[canepan]

Before contributing with actual changes, I thing this would put the package in a nicer spot. Next request will include the option to silence output (i.e. to run as a cron job)

[canepan]

I progressed on the fork. I converted the code to use OOP (objects), since it looks more logical to me (we have 2 pieces of code, one for Emby, the other for Jelly) with many parts in common. I am not sure this repo is still updated, so I will keep working on the fork if anyone wants to join/help. It is now a setuptools package, so it may easily become a pip package, it has basic tests and enforced formatting