Add Push Notification Token Management

[hyochan]

Description

Implemented notification permission handling using expo-notifications. The app now checks for and requests notification permissions on launch and when the app becomes active. Additionally, implemented push notification token handling using Supabase. Tokens are registered on login and deleted on logout.

Changes

Notification Permissions

• Integrated expo-notifications to manage notification permissions.
• Added permission check on app launch.
• Re-checked permissions when the app becomes active using AppState.
• Configured LSApplicationQueriesSchemes for mailto: in app.json.

Push Token Management

• Added functions for push token management in Supabase:
  • fetchAddPushToken: Adds or retrieves an existing push token.
  • fetchDeletePushToken: Deletes a push token.
  • fetchPushTokens: Fetches all push tokens for a user.
• Integrated token registration on login and deletion on logout in the app's layout.

How to Test

1. Notification Permissions:
   • Verify that the app requests notification permissions on launch.
     • Note that user should be signed-in.
   • Move the app to the background and back to the foreground to ensure permissions are re-checked.
2. Push Token Management:
   • Login:
     • Verify the token is added to the push_tokens table in Supabase.
   • Logout:
     • Verify the token is removed from the push_tokens table in Supabase.