Gamemode & Steam Fix and Add Gamescope

- Move gamemode and steam to system packages
- Add gamescope to user packages

user/gaming/utilities.nix

@@ -1,15 +1,10 @@
 { config, lib, pkgs, ... }:
 
 {
-  programs.gamemode = {
-    enable = true;
-    # settings = {};
-    # enableRenice = true;
-  };
-
   home.packages = (with pkgs; [
     mangohud
     goverlay
     vkbasalt
+    gamescope
   ]);
 }