fix: enable publishing for avahi service in default.nix and update uxplay configuration in packages.nix

nixos/services/printing/default.nix

@@ -10,6 +10,11 @@
     enable = true;
     nssmdns4 = true;
     openFirewall = true;
+    publish = {
+      enable = true;
+      addresses = true;
+      userServices = true;
+    };
   };
 
   hardware.sane = {