Add Transformers.js config

config.json

@@ -25,6 +25,14 @@
   "tie_word_embeddings": true,
   "torch_dtype": "bfloat16",
   "transformers_version": "4.53.0.dev0",
+  "transformers.js_config": {
+    "use_external_data_format": true,
+    "dtype": "q4",
+    "kv_cache_dtype": {
+      "q4f16": "float16",
+      "fp16": "float16"
+    }
+  },
   "use_cache": true,
   "use_sliding_window": false,
   "vocab_size": 128256