Create Asset class separate from Subscriber

[owenpearson]

This would be a more sensible API interface and allow us to implement tracking multiple assets on one connection without a further breaking change.

The usage after this change would look like:

const subscriber = new Subscriber(ablyOptions); // basically just a thin wrapper around Ably.Realtime

const asset = subscriber.get('my-trackable-id'); // analogous to Ably.Realtime.Channels.get

asset.onLocationUpdate(location => {
  // handle location update
});

asset.onStatusUpdate(location => {
  // handle status update
});

await asset.start(); // analogous to RealtimeChannel.attach

await subscriber.sendChangeRequest({
  accuracy: Accuracy.Low,
  desiredInterval: 3000,
  minimumDisplacement: 5,
});

[sync-by-unito]

➤ Automation for Jira commented:

The link to the corresponding Jira issue is https://ably.atlassian.net/browse/SDK-2813