chore(deps-dev): bump eslint from 8.57.1 to 9.28.0

Bumps [eslint](https://github.com/eslint/eslint) from 8.57.1 to 9.28.0.
- [Release notes](https://github.com/eslint/eslint/releases)
- [Changelog](https://github.com/eslint/eslint/blob/main/CHANGELOG.md)
- [Commits](eslint/eslint@v8.57.1...v9.28.0)

---
updated-dependencies:
- dependency-name: eslint
  dependency-version: 9.28.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

eslint.config.mjs

@@ -0,0 +1,15 @@
+import guardian from '@guardian/eslint-config';
+import prettier from 'eslint-plugin-prettier';
+
+export default [
+	...guardian.configs.recommended,
+	...guardian.configs.jest,
+	{
+		plugins: {
+			prettier,
+		},
+		rules: {
+			'prettier/prettier': 'error',
+		},
+	},
+];