Overhaul end user documentation

docs/user_documentation/queue/add_tracks.md

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+# Add tracks to your queue
+
+Add tracks to your queue to start listening to them. Choose from the following __Play options__:
+
+- __Play__ – remove all content from the queue and play the selected track.
+- __Add to queue__ – add the selected track to the end of the queue.
+- __Play next__ – add the selected track to the next position in the queue.
+- __Play now__ – play the selected track immediately but do not clear the queue.
+
+To add a track to the queue:
+
+1. Find your track in a track table.
+2. Select the orange play button ({fa}`play`) to __Play__ the track. Select the kebab menu ({fa}`ellipsis-v`) to select a different __Play option__.
+
+That's it! You've added the track to your queue.