feat: add remark-gfm support for enhanced markdown processing and update layout for improved sidebar navigation

Author: PramithaMJ

docs/web/package-lock.json

@@ -14,6 +14,7 @@
     "react": "19.2.4",
     "react-dom": "19.2.4",
     "remark": "^15.0.1",
+    "remark-gfm": "^4.0.1",
     "remark-html": "^16.0.1"
   },
   "devDependencies": {