Added sunshine configuration

modules/system/programs/sunshine.nix

@@ -0,0 +1,11 @@
+{ ..., pkgs }:
+
+{
+  services.sunshine = {
+    enable = true;
+    package = pkgs.unstable.sunshine;
+    autostart = true;
+    capSysAdmin = true;
+    openFirewall = true;
+  };
+}