feat: bump up fabric example react-native iOS (#3951)

* feat: 🔥 version bump react native for ios FabricExample
* feat: ✨ copied newly created basic example TS files

examples/FabricExample/__tests__/App-test.tsx

@@ -6,6 +6,9 @@ import 'react-native';
 import React from 'react';
 import App from '../App';
 
+// Note: import explicitly to use the types shipped with jest.
+import {it} from '@jest/globals';
+
 // Note: test renderer must be required after react-native.
 import renderer from 'react-test-renderer';