example: updated expo example

examples/expo/App.tsx

@@ -2,7 +2,7 @@ import React from "react";
 import { StatusBar } from "expo-status-bar";
 import { Text, View } from "react-native";
 
-import "./main.css";
+import "./styles";
 
 export default function App() {
   return (

examples/expo/globals.d.ts

@@ -0,0 +1 @@
+declare module "*.css";

examples/expo/styles/index.ts

@@ -0,0 +1,2 @@
+// Intentionally left empty
+export {};

examples/expo/styles/index.web.ts

@@ -0,0 +1 @@
+import "./main.css";