Check if song is from playlist queue or user queue

[idoria75]

This will be useful to check if the user decided to play a specific track next, or whether it is part of the normal playback

[idoria75]

The method sp.queue()["queue"] returns the items in the queue, which can be both from the playlist or added by the user.
To check if the queue was changed by the user, we need to monitor the queue and compare its new state with the old one. If new songs are at the top of the queue, these were added by the user.