Add transformer config to model index (diffusers)

model_index.json

@@ -37,8 +37,12 @@
     "transformers",
     "PreTrainedTokenizerFast"
   ],
+  "transformer": [
+    "diffusers",
+    "HiDreamImageTransformer2DModel"
+  ],
   "vae": [
     "diffusers",
     "AutoencoderKL"
   ]
-}
+}