Add Composer archive template

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Add a template archive to display entries in the Composer taxonomy.
This will list the Tracks to which the composer contributed, as listed in the sleeve notes, or extracted from the actual recording's meta information.

Format: Title, duration, Recording
Ordered by: ?
Order: ASC ?

composer is a taxonomy associated to the oik-track CPT.

Optional

• Display the other composer(s) for each track
• Display a Spotify link to the track

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Current screenshot for a Composer's archive - taxonomy-composer template.