fix: steam params

hosts/modules/steam.nix

@@ -4,5 +4,9 @@
     extraCompatPackages = with pkgs; [
       proton-ge-bin
     ];
+    gamescopeSession.enable = true;
+    remotePlay.openFirewall = true;
+    dedicatedServer.openFirewall = true;
+    localNetworkGameTransfers.openFirewall = true;
   };
 }