build(deps-dev): bump eslint-plugin-react-x from 2.13.0 to 5.6.6

Bumps [eslint-plugin-react-x](https://github.com/Rel1cx/eslint-react/tree/HEAD/plugins/eslint-plugin-react-x) from 2.13.0 to 5.6.6.
- [Release notes](https://github.com/Rel1cx/eslint-react/releases)
- [Changelog](https://github.com/Rel1cx/eslint-react/blob/main/CHANGELOG.md)
- [Commits](https://github.com/Rel1cx/eslint-react/commits/v5.6.6/plugins/eslint-plugin-react-x)

---
updated-dependencies:
- dependency-name: eslint-plugin-react-x
  dependency-version: 5.6.6
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package.json

@@ -26,7 +26,7 @@
     "eslint-plugin-react-dom": "^2.3.9",
     "eslint-plugin-react-hooks": "^7.0.1",
     "eslint-plugin-react-refresh": "^0.4.24",
-    "eslint-plugin-react-x": "^2.13.0",
+    "eslint-plugin-react-x": "^5.6.6",
     "globals": "^16.2.0",
     "typescript": "~5.9.3",
     "typescript-eslint": "^8.59.1",