feat(extensions): add telegram-tts extension for voice responses

Add a new extension that provides automatic text-to-speech for chat
responses using ElevenLabs API.

Features:
- `speak` tool for converting text to voice messages
- RPC methods: tts.status, tts.enable, tts.disable, tts.convert
- User preferences file for persistent TTS state
- Configurable voice ID, model, and max text length

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

extensions/telegram-tts/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "@clawdbot/telegram-tts",
+  "version": "0.1.0",
+  "private": true,
+  "description": "Automatic text-to-speech for chat responses using ElevenLabs",
+  "main": "index.ts"
+}