chore: add native stack to expo example

example/src/Screens/NativeStack.expo.tsx

@@ -1,23 +0,0 @@
-import * as React from 'react';
-import { View, Text, StyleSheet } from 'react-native';
-
-export default function NativeStack() {
-  return (
-    <View style={styles.container}>
-      <Text style={styles.text}>Currently not supported on Expo :(</Text>
-    </View>
-  );
-}
-
-const styles = StyleSheet.create({
-  container: {
-    flex: 1,
-    alignItems: 'center',
-    justifyContent: 'center',
-    backgroundColor: '#eceff1',
-  },
-  text: {
-    fontSize: 16,
-    color: '#999',
-  },
-});