feat: fix log output of model configuration

src/index.js

@@ -60,7 +60,7 @@ async function initializeWebLLMEngine() {
     context_window_size,
   };
   console.log(`Loading Model: ${selectedModel}`);
-  console.log(`Config: ${Object.toString(config)}`);
+  console.log(`Config: ${JSON.stringify(config)}`);
   await engine.reload(selectedModel, config);
   modelLoaded = true;
 }