chore: add next-sitemap as dev dependency

Author: oliver-dev01

package-lock.json

@@ -61,6 +61,7 @@
     "eslint-plugin-react-hooks": "^5.1.0",
     "glob": "^10.3.10",
     "jsdom": "^24.0.0",
+    "next-sitemap": "^4.2.3",
     "postcss": "^8.4.35",
     "postcss-import": "^16.0.1",
     "prettier": "^3.2.5",