feat: Add limit-mm-data-per-request argument to server arguments (#15418)

Signed-off-by: Xinyuan Tong <xinyuantong.cs@gmail.com>

docs/advanced_features/server_arguments.md

@@ -93,6 +93,7 @@ Please consult the documentation below and [server_args.py](https://github.com/s
 | `--context-length` | The model's maximum context length. Defaults to None (will use the value from the model's config.json instead). | `None` | Type: int |
 | `--is-embedding` | Whether to use a CausalLM as an embedding model. | `False` | bool flag (set to enable) |
 | `--enable-multimodal` | Enable the multimodal functionality for the served model. If the model being served is not multimodal, nothing will happen | `None` | bool flag (set to enable) |
+| `--limit-mm-data-per-request` | Limit the number of multimodal inputs per request. e.g. '{"image": 1, "video": 1, "audio": 1}' | `None` | Type: JSON / Dict |
 | `--revision` | The specific model version to use. It can be a branch name, a tag name, or a commit id. If unspecified, will use the default version. | `None` | Type: str |
 | `--model-impl` | Which implementation of the model to use. * "auto" will try to use the SGLang implementation if it exists and fall back to the Transformers implementation if no SGLang implementation is available. * "sglang" will use the SGLang model implementation. * "transformers" will use the Transformers model implementation. | `auto` | Type: str |