chore: use self.homeManagerModules instead of absolute path

reference/hosts/callisto/default.nix

@@ -10,7 +10,10 @@
       self.nixosModules.liminalOS
       {
         home-manager.users.youwen = {
-          imports = [ ./home.nix ];
+          imports = [
+            ./home.nix
+            self.homeManagerModules.default
+          ];
         };
       }
     ]

reference/hosts/callisto/home.nix

@@ -1,6 +1,5 @@
 {
   imports = [
-    ../../../hm/modules
     ../../users/youwen
   ];