Add a stream for notification and channel events #140
Description
Since for performance reasons the chat client is connected outside of the NgZone we need to reenter the zone on notification and channel events manually. This can be problematic if an integrator wants to watch for notification/channel events. We should create a stream for the notification events, and another for the channel events of the active channel. This way integrators won't have to manually fiddle with the change detection system. I'm not sure if this is possible though, the scope of this task is to research that.
IF IT'S NOT POSSIBLE, WE SHOULD ADD A GUIDE ABOUT THIS IN THE DOCUMENTATION WITH CODE EXAMPLES.
Please note that they will still have to fiddle with that if they want to watch for a channel event that is not an active channel.