Reference Terminology search engines

[nichtich]

BARTOC FAST has been deprecated but there is at least another similar site where multiple terminologies can be queried for terms: https://termennetwerk.netwerkdigitaalerfgoed.nl/ provides a search interface. GraphQL is used in the backend. See GitHub repository and talk to Bob Coret.

BARTOC should at least reference Network of Terms search engine at https://bartoc.org/registries, maybe as new category? More integration into BARTOC could make sense as well. Maybe their vocabularies can be accessed via GraphQL so we could add it as API type and create a wrapper with cocoda-sdk?