✨ add uxplay config

nixos/uxplay.nix

@@ -0,0 +1,18 @@
+# article / guide:
+# https://taoa.io/posts/Setting-up-ipad-screen-mirroring-on-nixos
+# https://gist.github.com/cmrfrd/fe8f61da076f8a4a751bf8fc8cb579a5
+# also see: 24_nix_uxplay for script
+
+{ config, pkgs, ... }:
+
+{
+  services.avahi = {
+    nssmdns = true;
+    enable = true;
+    publish = {
+      enable = true;
+      userServices = true;
+      domain = true;
+    };
+  };
+}