Merge pull request #173 from guardian/dependabot/npm_and_yarn/eslint-9.28.0

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

Author: github-actions[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',
+		},
+	},
+];