[model] support MiniCPM-V-4.6 (#10472)

src/llamafactory/model/model_utils/visual.py

@@ -321,6 +321,14 @@ _register_composite_model(
 )
 
 
+_register_composite_model(
+    model_type="minicpmv4_6",
+    projector_keys=["model.merger"],
+    vision_model_keys=["model.vision_tower"],
+    language_model_keys=["model.language_model", "lm_head"],
+)
+
+
 _register_composite_model(
     model_type="minicpmo",
     projector_keys=["resampler"],