Add:

-  google-services.json
- utils/notifications.ts

Fix:
- app.config.js : tambah access googleServicesFile
- app/_layout.tsx : tambah untuk push notifikasi
- package.json: install install expo-notifications expo-device expo-constants

### No Issue

utils/notifications.ts

@@ -0,0 +1,42 @@
+// utils/notifications.ts
+import * as Device from 'expo-device';
+import * as Notifications from 'expo-notifications';
+import Constants from 'expo-constants';
+
+Notifications.setNotificationHandler({
+  handleNotification: async () => ({
+    shouldShowAlert: true,
+    shouldPlaySound: true,
+    shouldSetBadge: false,
+    shouldShowBanner: true,
+    shouldShowList: true,
+  }),
+});
+
+export async function registerForPushNotificationsAsync() {
+  if (!Device.isDevice) {
+    console.warn("Push notifications don't work on simulator");
+    return null;
+  }
+
+  const { status: existingStatus } = await Notifications.getPermissionsAsync();
+  let finalStatus = existingStatus;
+
+  if (existingStatus !== 'granted') {
+    const { status } = await Notifications.requestPermissionsAsync();
+    finalStatus = status;
+  }
+
+  if (finalStatus !== 'granted') {
+    console.warn('Permission not granted for push notifications');
+    return null;
+  }
+
+  const projectId = Constants?.expoConfig?.extra?.eas?.projectId;
+  const token = (await Notifications.getExpoPushTokenAsync({
+    projectId,
+  })).data;
+
+  console.log("Expo Push Token:", token);
+  return token;
+}