refactor(flake): move assembly code out of lib

modules/default.nix

@@ -1,6 +1,7 @@
 {
   config,
   lib,
+  dotfiles,
   pkgs,
   inputs,
   ...
@@ -63,8 +64,7 @@ in
       useGlobalPkgs = true;
       useUserPackages = true;
       extraSpecialArgs = {
-        inherit inputs;
-        my = inputs.self.lib;
+        inherit dotfiles inputs;
       };
       users.${user.name} = {
         home.username = user.name;