Bump react from 18.3.1 to 19.0.0

Bumps [react](https://github.com/facebook/react/tree/HEAD/packages/react) from 18.3.1 to 19.0.0.
- [Release notes](https://github.com/facebook/react/releases)
- [Changelog](https://github.com/facebook/react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/facebook/react/commits/HEAD/packages/react)

---
updated-dependencies:
- dependency-name: react
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -34,7 +34,7 @@
     "next": "^14.2",
     "postcss": "^8.4.38",
     "postcss-import": "^16.1.0",
-    "react": "^18.2.0",
+    "react": "^19.0.0",
     "react-markdown": "^9.0.1",
     "react-syntax-highlighter": "^15.5.0",
     "tailwindcss": "^3.4.4"