big module system implementation

home/modules/userd/copyq/default.nix

@@ -0,0 +1,17 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  inherit (lib) mkIf mkEnableOption;
+  cfg = config.modules.userd.copyq;
+in {
+  options = {
+    modules.userd.copyq.enable = mkEnableOption "Enables copyq";
+  };
+  config = mkIf cfg.enable {
+    services.copyq = {
+      enable = true;
+    };
+  };
+}