Overhaul end user documentation

docs/user_documentation/queue/add_playlist.md

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+# Add playlists to your queue
+
+Add entire playlists 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 playlist.
+- __Add to queue__ – add the selected playlist to the end of the queue.
+- __Play next__ – add the selected playlist to the next position in the queue.
+- __Play now__ – play the selected playlist immediately but do not clear the queue.
+
+You can add playlists from the following places:
+
+```{contents}
+:local:
+```
+
+## From the playlist details page
+
+To add an playlist to the queue from the playlist details page:
+
+1. Go to the playlist's details page.
+2. Select {guilabel}`Play all` to __Play__ the playlist. Select the dropdown icon ({fa}`caret-down`) to select a different __Play option__.
+
+You're done! You've added the playlist to your queue.
+
+## From an playlist card
+
+To add an playlist from its playlist card:
+
+1. Find the playlist card in the interface.
+2. Select the orange play button ({fa}`play`) to __Play__ the playlist. Select the kebab menu ({fa}`ellipsis-v`) to select a different __Play option__.
+
+That's it! You've added the playlist to your queue.