feat: meeting room for corporate-style collaboration

[tak2-08]

Summary

Adds a meeting room (agent-meeting.mjs) to agent-shared-context for corporate-style meetings with auto-generated minutes.

Features

• 8 meeting types: discussion(토론), presentation(발표), rebuttal(반박), decision(의사결정), standup(스탠드업), retrospective(회고), planning(계획), review(리뷰)
• 4 roles: moderator, presenter, participant, observer
• 8 speech kinds: statement, question, answer, objection, agreement, summary, action-item, decision
• Auto-minutes: Generates structured markdown minutes stored in agent-context/meetings/minutes/ AND as searchable agent-context entries (type: meeting)
• Integrated dispatcher: ac.mjs meeting <subcommand>
• Config updates: Added meeting to types, added meetings config section

Commands

# Create meeting
ac.mjs meeting create --title "Sprint Planning" --type planning --moderator alice --participants bob,charlie --agenda "Q4 goals"

# Join/start/speak/end
ac.mjs meeting join <id> <agent> [--role participant]
ac.mjs meeting start <id> <moderator>
ac.mjs meeting speak <id> <agent> "content" [--kind statement|objection|action-item|decision...] [--refs a,b]
ac.mjs meeting end <id> <moderator>

# List/read minutes
ac.mjs meeting list
ac.mjs meeting minutes <id>

Radio-Assembler Integration

The opencode Radio-Assembler agent (radio-assembler.md) uses this meeting room as the sole coordination backbone (no radio bus) for single-session multi-agent orchestration via task sub-agents.

📻 Generated with AgentRadio passive-awareness workflow.