[Feature] Message pool for agents to communicate

[dongyuanjushi]

Checked other resources

• I added a very descriptive title to this issue.
• I am sure the issue hasn't been already addressed by searching through https://github.com/agiresearch/AIOS/issues.

The feature, motivation and pitch

• Define the interface to enable message passing between agents
• Potential mechanisms
  • A global message pool, with a dispatcher to delegate messages
  • Each agent has its message queue, and some of the agents can send messages into other agent's queue

Alternatives

No response

Additional context

No response