Add Custom User Notification Sounds #94
Description
It appears iOS recently started allowing custom sounds in notifications with a Notification Service App extension.
https://developer.apple.com/documentation/usernotifications/unnotificationsound
https://developer.apple.com/documentation/usernotifications/modifying_content_in_newly_delivered_notifications/
In addition to App implementation. This may require Firmware and/or Server Implementation to store and serve sound files. An API the Notification Node Server can call to retrieve available notification sound names. Modification to the Notification Node Server to retrieve the users custom names to use in Programs.
App implementation requires download of Sound Assets. Adding Notification Service App Extension which will add the sound file to the Notification before delivery as custom notification sounds are not included in the app bundle.