[nix] moves gaming stuff to it's own file.

home-manager/drew.nix

@@ -5,6 +5,7 @@
     ./features/development-linux.nix
     ./features/haskell.nix
     ./features/nix.nix
+    ./features/gaming.nix
   ];
 
   home.stateVersion = "24.11";
@@ -20,17 +21,6 @@
     obsidian
     firefox
     waypaper # Wallpaper switcher
-
-    # Gaming
-    mangohud
-    (lutris.override {
-      extraPkgs = pkgs: [
-        winetricks # Needed for bnet setup.
-        vulkan-tools # Needed for bnet setup
-      ];
-    })
-    protonup-ng
-    vulkan-tools # useful for debugging Vulkan issues
   ];
 
   xdg.desktopEntries = {