Move stylix config up to flake.nix as config wouldn't build without it,
also move wallpapers directory up to top level to match
Only enable git-sync where it's defined, rather than in home/default.nix
Move commonModule into system/default.nix
Keep most essential parts (user definition, home-manager init) in
flake.nix but move rest to system/default.nix
Remove some tui expressions from home and add all to home/default.nix,
will always want those so always use
Disable gamescope session unless gamescope.nix imported
Move various home.package definitions to environment.systemPackage in
system/ expressions, located based on appropriate use
Move wallpapers directory due to restructure, no other changes to it
Evie Litherland-Smith
