feat: add vision, TTS, and browser tools (17 tools total)

- VisionTool: image analysis via Z.AI GLM-4V multimodal API
- TTSTool: text-to-speech via node-edge-tts (free, auto-sends audio to chat)
- BrowserTool: web page content extraction via cheerio (strips HTML, extracts text)
- All 3 wired into tools/index.js + bot tool definitions + handlers
- TTS handler auto-sends generated audio as voice message to chat

package.json

@@ -15,6 +15,7 @@
     "@grammyjs/runner": "^2.0.3",
     "axios": "^1.14.0",
     "chalk": "^5.4.0",
+    "cheerio": "^1.2.0",
     "commander": "^12.0.0",
     "discord.js": "^14.26.4",
     "dotenv": "^16.4.5",
@@ -23,6 +24,7 @@
     "fs-extra": "^11.2.0",
     "glob": "^13.0.6",
     "grammy": "^1.42.0",
+    "node-edge-tts": "^1.2.10",
     "openai": "^4.77.0",
     "p-queue": "^8.0.1",
     "winston": "^3.13.0",