Alternative mode for results: show and export results in FAIRtracks format

[sveinugu]

Idea: Search results could be exportable directly as FAIRtracks format, meaning one document with categories at the first level containing arrays with non-duplicated objects. One would need to keep track of which categories did not contain arrays in the original input (e.g. doc_info).

• Implement alternative search method. Create a SQL query for each category at a time, using DISTINCT keyword, and merge the results. Instead of 0,1,2,3 at the top level, the search results should be categories->[array of non-duplicated results of that category]. The search result would then be a filtered subset of the model browser, which might be useful in many settings.
• Create a new doc_info object for the search result. If the original doc_info has a global_id, add this to the doc_info->derived_from array.
• Make sure that core query is cached, so that the search is much quicker for the second category and onwards.
• Add a radio button or popup menu selection to change between the two result modes. Changing mode will result in a new search, which should be quick if there is a cache
• For the FAIRtracks mode: Use standard model browser for search results, based on a metamodel built from the search results from the queries above.
• "JSON" export button could then be renamed to "FAIRtracks JSON". GSuite export should work as before.
• Should also be available from the REST interface, perhaps by adding a parameter to the search endpoint