[Feature]Support async computation and communication across stages by chunks (#727)

Signed-off-by: amy-why-3459 <wuhaiyan17@huawei.com>
Signed-off-by: Rein Yang <ruiruyang2@gmail.com>
Co-authored-by: Rein Yang <ruiruyang2@gmail.com>
Co-authored-by: CHEN <116010019@link.cuhk.edu.cn>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>

docs/user_guide/examples/online_serving/qwen3_omni.md

@@ -15,6 +15,12 @@ Please refer to [README.md](https://github.com/vllm-project/vllm-omni/tree/main/
 vllm serve Qwen/Qwen3-Omni-30B-A3B-Instruct --omni --port 8091
 ```
 
+If you want to open async chunking for qwen3-omni, launch the server with command below
+
+```bash
+vllm serve Qwen/Qwen3-Omni-30B-A3B-Instruct --omni --port 8091 --stage-configs-path /vllm_omni/model_executor/stage_configs/qwen3_omni_moe_async_chunk.yaml
+```
+
 If you have custom stage configs file, launch the server with command below
 ```bash
 vllm serve Qwen/Qwen3-Omni-30B-A3B-Instruct --omni --port 8091 --stage-configs-path /path/to/stage_configs_file