Overhaul end user documentation

docs/user_documentation/queue/index.md

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+# Queue
+
+Use the audio queue to manage audio playback. You can add tracks, albums, series, artist discographies, and playlists to your queue.
+
+Follow the guides in this section to get started.
+
+```{toctree}
+---
+caption: Manage your queue
+maxdepth: 1
+---
+
+add_tracks
+add_album
+add_series
+add_artist
+add_playlist
+rearrange_content
+remove_content
+
+```