system/avahi: modularize

modules/system/avahi/default.nix

@@ -0,0 +1,23 @@
+# avahi related settings
+{ config, inputs, lib, options, pkgs, ... }:
+let
+  cfg = config.my.system.avahi;
+in
+{
+  options.my.system.avahi = with lib; {
+    enable = mkEnableOption "avahi configuration";
+  };
+
+  config = lib.mkIf cfg.enable {
+    services.avahi = {
+      enable = true;
+      nssmdns = true;
+      publish = {
+        enable = true;
+        addresses = true;
+        workstation = true;
+        userServices = true;
+      };
+    };
+  };
+}

modules/system/default.nix

@@ -1,6 +1,7 @@
 { ... }:
 {
   imports = [
+    ./avahi
     ./docker
     ./podman
   ];