[Feature] 请问sglang是否可以支持流式输出？大概时间？

### Checklist

- [ ] 1. If the issue you raised is not a feature but a question, please raise a discussion at https://github.com/sgl-project/sglang/discussions/new/choose Otherwise, it will be closed.
- [ ] 2. Please use English, otherwise it will be closed.

### Motivation

请问sglang是否可以支持流式输出？大概时间？

### Related resources

_No response_