Add config.json required by fastembed-rs tokenizer loader

config.json

@@ -0,0 +1,9 @@
+{
+    "model_type": "model2vec",
+    "architectures": ["StaticModel"],
+    "normalize": true,
+    "embedding_dtype": "float16",
+    "hidden_dim": 256,
+    "seq_length": 1000000,
+    "pad_token_id": 0
+}