feat(waybar): add enable option

home/modules/waybar/default.nix

@@ -1,11 +1,24 @@
+{
+  config,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.waybar;
+in
 {
   imports = [
     ./settings.nix
     ./style.nix
   ];
 
+  options.waybar.enable = lib.mkEnableOption "waybar";
+
+  config = lib.mkIf cfg.enable {
     programs.waybar = {
       enable = true;
       systemd.enable = true;
     };
+  };
 }