Support llama3.2vl.

Former-commit-id: 664229d7d1f7994e1ae68c5d197ab81f081bcd2e

src/llamafactory/data/template.py

@@ -762,6 +762,33 @@ _register_template(
 )
 
 
+_register_template(
+    name="mllama",
+    format_user=StringFormatter(
+        slots=[
+            (
+                "<|start_header_id|>user<|end_header_id|>\n\n{{content}}<|eot_id|>"
+                "<|start_header_id|>assistant<|end_header_id|>\n\n"
+            )
+        ]
+    ),
+    format_system=StringFormatter(slots=["<|start_header_id|>system<|end_header_id|>\n\n{{content}}<|eot_id|>"]),
+    format_observation=StringFormatter(
+        slots=[
+            (
+                "<|start_header_id|>tool<|end_header_id|>\n\n{{content}}<|eot_id|>"
+                "<|start_header_id|>assistant<|end_header_id|>\n\n"
+            )
+        ]
+    ),
+    format_prefix=EmptyFormatter(slots=[{"bos_token"}]),
+    stop_words=["<|eot_id|>"],
+    replace_eos=True,
+    replace_jinja_template=False,
+    mm_plugin=get_mm_plugin(name="mllama", image_token="<image>"),
+)
+
+
 _register_template(
     name="llava",
     format_user=StringFormatter(slots=["USER: {{content}} ASSISTANT:"]),