add expo app

apps/mobile/babel.config.js

@@ -0,0 +1,10 @@
+module.exports = function (api) {
+  api.cache(true);
+  return {
+    presets: ['babel-preset-expo'],
+    plugins: [
+      // Required for expo-router
+      'expo-router/babel',
+    ],
+  };
+};