feat(crawler): fix async crawling

apps/mobile/src/app/_layout.tsx

@@ -0,0 +1,5 @@
+import { Stack } from "expo-router";
+
+export default function RootLayout() {
+  return <Stack />;
+}

apps/mobile/src/app/index.tsx

@@ -0,0 +1,15 @@
+import { Text, View } from "react-native";
+
+export default function Index() {
+  return (
+    <View
+      style={{
+        alignItems: "center",
+        flex: 1,
+        justifyContent: "center",
+      }}
+    >
+      <Text>Edit app/index.tsx to edit this screen.</Text>
+    </View>
+  );
+}