chore(deps): bump react and @types/react

Bumps [react](https://github.com/facebook/react/tree/HEAD/packages/react) and [@types/react](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react). These dependencies needed to be updated together.

Updates `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/v19.0.0/packages/react)

Updates `@types/react` from 18.3.12 to 19.0.8
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react)

---
updated-dependencies:
- dependency-name: react
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: "@types/react"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

core/package.json

@@ -127,7 +127,7 @@
     "proxy-agent": "^6.5.0",
     "qs": "^6.13.1",
     "query-string": "^9.1.0",
-    "react": "^18.3.1",
+    "react": "^19.0.0",
     "readdir-enhanced": "^6.0.4",
     "respawn": "^2.6.0",
     "semver": "^7.6.3",
@@ -209,7 +209,7 @@
     "@types/proper-lockfile": "^4.1.4",
     "@types/ps-tree": "^1.1.6",
     "@types/qs": "^6.9.17",
-    "@types/react": "^18.3.12",
+    "@types/react": "^19.0.8",
     "@types/sinon": "^17.0.3",
     "@types/split2": "^4.2.3",
     "@types/supertest": "^6.0.2",