fix(deps): update react monorepo to v19

Author: renovate[bot]

frontend/package.json

@@ -19,8 +19,8 @@
     "clsx": "2.1.1",
     "prism-react-renderer": "2.4.1",
     "raw-loader": "^4.0.2",
-    "react": "18.3.1",
-    "react-dom": "18.3.1"
+    "react": "19.0.0",
+    "react-dom": "19.0.0"
   },
   "devDependencies": {
     "@docusaurus/module-type-aliases": "3.6.3"