fix(settings): restrict minimal persistence keys

settings.json.example

@@ -1,17 +1,16 @@
 {
+  "_note": "LoRA Manager builds the detailed library registry automatically at runtime.",
+  "language": "en",
   "civitai_api_key": "your_civitai_api_key_here",
   "folder_paths": {
     "loras": [
-      "C:/path/to/your/loras_folder",
-      "C:/path/to/another/loras_folder"
+      "C:/path/to/your/loras_folder"
     ],
     "checkpoints": [
-      "C:/path/to/your/checkpoints_folder",
-      "C:/path/to/another/checkpoints_folder"
+      "C:/path/to/your/checkpoints_folder"
     ],
     "embeddings": [
-      "C:/path/to/your/embeddings_folder",
-      "C:/path/to/another/embeddings_folder"
+      "C:/path/to/your/embeddings_folder"
     ]
   }
-}
+}