feat: add basic 'gaming' module to 'andromache'

hosts/andromache/default.nix

@@ -27,6 +27,7 @@ in
     ../../modules/desktops/niri
     ../../modules/backups
     ../../modules/bluetooth
+    ../../modules/gaming
     ../../modules/keyboard
     (import ../../modules/networking { inherit hostName; })
     ../../modules/users

modules/gaming/default.nix

@@ -0,0 +1,12 @@
+{
+  nixpkgs.allowedUnfree = [
+    "steam"
+    "steam-unwrapped"
+  ];
+
+  programs.steam = {
+    enable = true;
+    remotePlay.openFirewall = false;
+    dedicatedServer.openFirewall = false;
+  };
+}