Deduplicate all applications and system settings

modules/application-groups/gaming.nix

@@ -1,5 +1,32 @@
-{ ... }: {
-  imports = [
-    ../applications/steam.nix
+{ pkgs, ... }:
+{
+  # Support steam hardware like the index and steam controller
+  hardware.steam-hardware.enable = true;
+
+  # Steam
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = true;
+    dedicatedServer.openFirewall = true;
+    gamescopeSession.enable = true;
+  };
+
+  # Valve's micro-compositor
+  programs.gamescope = {
+    enable = true;
+    capSysNice = true;
+  };
+
+  # Open source OpenXR runtime for VR
+  services.monado = {
+    enable = true;
+    defaultRuntime = true;
+    highPriority = true;
+  };
+
+  environment.systemPackages = with pkgs; [
+    bs-manager
+    heroic
+    monado
   ];
-}
+}