[Feature]: Does ag-ui-client support Agent Team mode of Claude Agent SDK?

### Pre-flight Checklist

- [x] I have searched existing issues and this hasn't been requested yet.

### Problem or Motivation

Does ag-ui-client support Agent Team mode of Claude Agent SDK?
hope you can give a conclusion officially and confirm this answer. Because if ag ui cannot support this mode now, we need to haive a try.

ag_ui_protocol == 0.1.19
claude_agent_sdk == 0.2.87
python == 3.12

### Proposed Solution

I hope you can give a conclusion officially and confirm this answer. Because if ag ui cannot support this mode now, we need to have a try.

### Alternatives Considered

_No response_

### Additional Context

_No response_