feat: add web_fetch tool

agent/package.json

@@ -14,9 +14,14 @@
     "@elysiajs/bearer": "^1.4.2",
     "@elysiajs/cors": "^1.4.1",
     "@modelcontextprotocol/sdk": "^1.25.2",
+    "@mozilla/readability": "^0.6.0",
+    "@types/jsdom": "^27.0.0",
+    "@types/turndown": "^5.0.6",
     "ai": "^6.0.25",
     "elysia": "latest",
+    "jsdom": "^27.4.0",
     "toml": "^3.0.0",
+    "turndown": "^7.2.2",
     "zod": "^4.3.5"
   },
   "devDependencies": {