steam mod, move adwaita to homeModules

nixosModules/steam.nix

@@ -0,0 +1,48 @@
+{ nixosModules, ... }:
+{
+  imports = [ nixosModules.allowed-unfree-list ];
+
+  hardware.steam-hardware.enable = true;
+
+  programs = {
+    steam = {
+      enable = true;
+      remotePlay.openFirewall = true;
+      dedicatedServer.openFirewall = true;
+      localNetworkGameTransfers.openFirewall = true;
+      gamescopeSession.enable = false;
+    };
+    gamemode.enable = true;
+  };
+
+  # steam network transfer
+  networking.firewall = {
+    allowedUDPPorts = [ 3478 ];
+    allowedTCPPorts = [ 24070 ];
+
+    allowedTCPPortRanges = [
+      {
+        from = 27015;
+        to = 27050;
+      }
+    ];
+
+    allowedUDPPortRanges = [
+      {
+        from = 4379;
+        to = 4380;
+      }
+      {
+        from = 27000;
+        to = 27100;
+      }
+    ];
+  };
+
+  allowedUnfreePackages = [
+    "steam"
+    "steam-original"
+    "steam-run"
+    "steam-unwrapped"
+  ];
+}