feat(msteams): add MS Teams provider skeleton

- Add Microsoft 365 Agents SDK packages (@microsoft/agents-hosting,
  @microsoft/agents-hosting-express, @microsoft/agents-hosting-extensions-teams)
- Add MSTeamsConfig type and zod schema
- Create src/msteams/ provider with monitor, token, send, probe
- Wire provider into gateway (server-providers.ts, server.ts)
- Add msteams to all provider type unions (hooks, queue, cron, etc.)
- Update implementation guide with new SDK and progress

package.json

@@ -1,6 +1,6 @@
 {
   "name": "clawdbot",
-  "version": "2026.1.9",
+  "version": "2026.1.8-2",
   "description": "WhatsApp gateway CLI (Baileys web) with Pi RPC agent",
   "type": "module",
   "main": "dist/index.js",
@@ -101,6 +101,9 @@
     "@mariozechner/pi-ai": "^0.41.0",
     "@mariozechner/pi-coding-agent": "^0.41.0",
     "@mariozechner/pi-tui": "^0.41.0",
+    "@microsoft/agents-hosting": "^1.1.1",
+    "@microsoft/agents-hosting-express": "^1.1.1",
+    "@microsoft/agents-hosting-extensions-teams": "^1.1.1",
     "@sinclair/typebox": "0.34.47",
     "@slack/bolt": "^4.6.0",
     "@slack/web-api": "^7.13.0",