perf: Home-manager to module

feat: Optionise config

modules/host/printing.nix

@@ -0,0 +1,9 @@
+{ config, lib, ... }:
+
+lib.mkIf config.services.printing.enable {
+  services.avahi = {
+    enable = true;
+    nssmdns4 = true;
+    openFirewall = true;
+  };
+}