write mkConfWrapper function for helix

this makes helix use the user config instead, if it exists

default.nix

@@ -1,5 +1,6 @@
 {
   lib,
+  pkgs,
   config,
   ...
 }:
@@ -18,8 +19,12 @@ in
     enable = lib.mkEnableOption "common settings";
   };
 
-  config = lib.mkIf cfg.enable {
-    nixowos.cli.enable = true;
-    nixowos.system.enable = true;
+  config = {
+    _module.args.owoLib = pkgs.callPackage ./lib { };
+
+    nixowos = lib.mkIf cfg.enable {
+      cli.enable = true;
+      system.enable = true;
+    };
   };
 }