missing setup.py-files for packaging

[Serkan-devel]

The pelican theme and plugins don't have a setup.py associated with it to make packaging easier.

https://packaging.python.org/tutorials/packaging-projects/

[mosra]

Hi, this was one item on my large TODO list, but so far I was not able to get to it :)

I have no experience with Python packaging myself, do you think you could provide a proof-of-concept PR adding this? Thank you!

[Serkan-devel]

Idk if I would complete this https://github.com/mosra/m.css/pull/97 , might work on it later

[ashwinvis]

This will have to be fixed for the next Pelican release (5.x) which supports importable modules. The old method is still supported, but it does not work for a package like plugin system which m.css has. See: https://pelican.readthedocs.io/en/latest/plugins.html