docs request: publish an official agent teams workflow reference

Summary

Could the team publish an official, centralized reference for current experimental multi-agent / team workflow (lifecycle, task tools, messaging tools)?

Why

Users currently piece together behavior from code and release notes. A single canonical guide would improve adoption and reduce confusion.

Suggested scope

• Team lifecycle (spawn_team / wait_team / close/cleanup)
• Task tool flow
• Messaging/broadcast flow
• Configuration notes and safety caveats

Prior PR context

I attempted to contribute repo docs in PR #12531, and understand docs source is maintained outside this repo. Opening this issue to request the official docs update in the correct source.