feat(steam): configure Quest VR streaming

configs/nixos/hosts/neogaia/default.nix

@@ -40,7 +40,6 @@
   modules.desktop.enable = true;
   modules.desktop.apps.firefox.uiScale = "1.25";
   modules.desktop.apps.obsidian.enable = true;
-  modules.desktop.apps.steam.enable = true;
 
   registry.waybar.neogaia.battery = {
     order = 70;

configs/nixos/modules/desktop/apps/steam.nix

@@ -14,6 +14,7 @@
 
     programs.steam = {
       enable = true;
+      remotePlay.openFirewall = true;
       package = pkgs.steam.override {
         extraEnv.STEAM_FORCE_DESKTOPUI_SCALING = "1.5";
       };
@@ -21,9 +22,10 @@
 
     hardware.steam-hardware.enable = true;
 
-    environment.systemPackages = [
-      pkgs.gamescope
-    ];
+    programs.gamescope = {
+      enable = true;
+      capSysNice = true;
+    };
 
     registry.window-icon.${config.networking.hostName}.steam = {
       class = "[Ss]team";