vanadium: enable printer

nix/configurations/vanadium/nixos/connectivity.nix

@@ -76,4 +76,20 @@
   services.mullvad-vpn.enable = true;
 
   hardware.bluetooth.enable = true;
+
+
+  # Printing and auto-discovery of Wi-Fi printers
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    openFirewall = true;
+  };
+
+  services.printing = {
+    enable = true;
+    drivers = with pkgs; [
+      cups-filters
+      cups-browsed
+    ];
+  };
 }