another reorg; add options for full or minimal helix install

configuration/modules/gaming.nix

@@ -0,0 +1,19 @@
+{ ... }:
+
+{
+  hardware.graphics.enable32Bit = true; # For 32 bit applications
+  hardware.steam-hardware.enable = true;
+
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = true; # Open ports in the firewall for Steam Remote Play
+    dedicatedServer.openFirewall = true; # Open ports in the firewall for Source Dedicated Server
+    #gamescopeSession.enable = true;
+    protontricks.enable = true;
+  };
+  programs.gamemode.enable = true;
+  programs.gamescope.enable = true;
+
+  # ensure users who need access to this have `cdrom` as `extraGroups`
+  programs.cdemu.enable = true;
+}