Add autocompletion for genus + species in search

[lukasjelonek]

When entering the first characters the system should provide suggestions, based on all available values in gtdbtk.classification.

[lukasjelonek]

The autocompletion can be created directly from the index data.

Implementation suggestion:

• create autocompletion action for field gtdbtk.classification

  • processes all classification values from all documents
  • filters unique values
  • stores unique values in an autocompletion index

• autocompletion action

  • /autocomplete/gtdbtk.classification?text=abc
  • returns 20 suggestion documents
  • UI generates entries for all levels, as we do not store partial classifications
  • When the user selects a classification a query will be created for the selected classfication level

[lukasjelonek]

I implemented a slight variantion of the suggestion:

• returns 5 suggestions
• is per classification level, e.g. species, genus, ...
• at the moment it is prefix-based with up to two mismatches
• path is /completion/classification/<level>/<prefix>