feat!: move msteams to plugin

docs/plugin.md

@@ -35,9 +35,11 @@ See [Voice Call](/plugins/voice-call) for a concrete example plugin.
 
 ## Available plugins (official)
 
+- Microsoft Teams is plugin-only as of 2026.1.15; install `@clawdbot/msteams` if you use Teams.
 - [Voice Call](/plugins/voice-call) — `@clawdbot/voice-call`
 - [Matrix](/channels/matrix) — `@clawdbot/matrix`
 - [Zalo](/channels/zalo) — `@clawdbot/zalo`
+- [Microsoft Teams](/channels/msteams) — `@clawdbot/msteams`
 
 Clawdbot plugins are **TypeScript modules** loaded at runtime via jiti. They can
 register: