[Feature Request]: Whether an agent component can have an intermediate output component?

### Is there an existing issue for the same feature request?

- [X] I have checked the existing issues.

### Is your feature request related to a problem?

_No response_

### Describe the feature you'd like

Whether an agent component can have an intermediate output component?For example, there is a generation process in the middle, and I want to output the generation to the user first, and then continue to execute the process behind the agent and complete the final output

### Describe implementation you've considered

_No response_

### Documentation, adoption, use case

_No response_

### Additional information

_No response_

No files, tests, or entry points are named. Start by tracing the agent component's execution flow and how outputs are delivered to users. Define whether an intermediate generation can be emitted before execution resumes, and verify that both the intermediate and final outputs are delivered in the expected order.

Written by the indexing model from the issue text.