Update react monorepo to v19

Author: renovate[bot]

frontend/package.json

@@ -9,9 +9,9 @@
     "jquery": "^3.6.0",
     "mdbreact": "^5.2.0",
     "popper.js": "^2.10.2",
-    "react": "^18.2.0",
+    "react": "^19.0.0",
     "react-bootstrap": "^2.0.0-beta.6",
-    "react-dom": "^18.0.0",
+    "react-dom": "^19.0.0",
     "react-icons": "^4.3.1",
     "react-scripts": "^5.0.0",
     "web3": "^1.5.2"