move gui packages to their own file so they don't have to be installed on servers

nixos/pkg.nix

@@ -46,18 +46,8 @@
     # javascript stuff 🤮
     nodejs
     corepack
-
-    # catppuccin
-    (catppuccin-kde.override {
-      flavour = [ "mocha" "macchiato" "frappe" "latte" ];
-      accents = [ "blue" ];
-      winDecStyles = [ "classic" ];
-    })
   ];
 
-  fonts.packages = with pkgs;
-    [ (nerdfonts.override { fonts = [ "FiraCode" ]; }) ];
-
   # install docker
   virtualisation.docker = { enable = true; };