[WIP] Add makefile

[ran-dall]

Closes #199 #170

This PR adds a makefile with the preferred end-user deployment configuration.

This make file currently has 2 options (more options may be added later):

gnome-40 : Switch to the right gnome-shell.css file and deploys files and folders for libadwaita compatibility on GNOME 40+.
prune : Deletes superfluous folders (i.e. will delete KDE, if not using KDE; GNOME if not using GNOME; etc...).

[vivshaw]

👍 on this- I had trouble with my upgrade to Gnome 42, and these gnome-40 build steps fixed it! But they aren't clearly documented elsewhere, and are difficult to find by digging through GitHub issues. It'd be nice to have some sort of built-in script like this (or barring that, to add least add these steps to the docs)

[ran-dall]

+1 on this- I had trouble with my upgrade to Gnome 42, and these gnome-40 build steps fixed it!

@vivshaw Awesome! Super glad it helped. I was hoping to get this kind of feedback. 😁

But they aren't clearly documented elsewhere, and are difficult to find by digging through GitHub issues.

Good point. I will make sure to modify the docs and README in this PR so that it is properly notated and documented.

Thanks again for the feedback! 🤝