feat: Enhance chatbot markdown with remark-gfm

Author: tjtanjin

package-lock.json

@@ -38,6 +38,7 @@
     "react-icons": "^5.3.0",
     "react-router-dom": "^6.2.2",
     "react-toastify": "^11.0.2",
+    "remark-gfm": "^4.0.1",
     "uuid": "^9.0.1",
     "web-vitals": "^1.1.2"
   },