A2A_MCP example execution

@holtskinner Hi! Thank you so much for providing us with all these great code samples! :)
I have a quick question about running the A2A_MCP project.
Are we supposed to create an A2AClient to run directly the Orchestrator?
I am asking this since only the Orchestrator communicates with all the other agents via the
A2AClients encapsulated in each node, but there's no code sample to run the Orchestrator which activates the entire workflow.

Can you please clarify if this is supposed to be the the entry point for the entire project or am I missing anything else please ? :)

Thanks in advance,
Veronica!

查看 A2A_MCP 项目的结构，以了解 Orchestrator 和 A2AClient 的角色。该 issue 要求提供代码示例或文档，说明如何运行 Orchestrator 以激活 workflow。检查 repository 中是否已有入口点、README 文件或示例脚本。目标是为首次贡献者明确执行流程。

由索引模型根据 Issue 内容生成。