[WIP] Support for Cinnamon desktop (muffin)

[ItzSwirlz]

I'd love to get this into Debian as a debian packager/semi contributor, but if this is the case I'd like to expand it to other DE's GTK based. This may mean renaming the repo but for now, here.

Muffin 5.2 may be rebased off of Mutter 3.36.9 and if that's the case, it will be easier to maintain.

WIP as I need to check schemas and other deps...

shoutout to the VSCode devs. although I use atom and strictly atom only, I can do this in my free time at school :)