Create a view for managing taxonomy terms

[rosiel]

From @kayakr in Islandora/documentation#1899

Create a place for managing taxonomy terms (as a metadata manager who may need to do bulk operations etc)

Some requirements I've gathered/am interested in:

• list all terms; sounds trivial, but becomes a risk when using search-based listings from Search API DB, Search API Solr, etc. Implies immediate indexing of changes (add, change, delete, etc.)
• can handle large taxonomies, multiple x 10,000s of terms
• Result summary: Displaying {start} - {end} of {total}
• Filter by term label (e.g. name), especially with fuzzy matching, stemming (implies search basis)
• can handle macrons and other special characters (e.g. Solr ASCII-folding)
• Show additional fields in management UI
  • Published/unpublished status
  • term id
  • field_authority_link
  • local URI?
  • count of related content items
• Bulk operations
  • index to fcrepo and index to blazegraph by default (tbc)
  • Select 1..N terms and move to different vocabulary (e.g. term added as Person, move to Corporate Body)
  • Select 1..N merge to 1 of N, where 1 is existing preferred term
  • Publish/Unpublish
  • Delete
• Export
  • as CSV
  • as JSON
  • as SKOS?
• Import
  • as CSV
  • as JSON
  • as SKOS
• publish/subscribe - 1 instance can be primary, other instances can subscribe to changes
• round-trip to/from OpenRefine
• clustering per OpenRefine algorithms
• trim (alert on trailing or leading (white)space)

Originally posted by @kayakr in Islandora/documentation#1899 (comment)