Support create_classifications

Refs arkindex/requests#55

unassigned @babadie

With support for local cache

But low prio

added 1 deleted label

assigned to @erwanrouchet

assigned to @Eva_Bardou and unassigned @erwanrouchet

Needed for https://gitlab.com/teklia/workers/geosophy_classifier/-/merge_requests/1/diffs#6d3c0b21cdc8d9987bd0a6d9d4caf11e0bfec456 too

added 1 deleted label and removed 1 deleted label

mentioned in merge request !122 (merged)

closed