Improve the search engine of the search service

[agpul]

Basic acceptance criteria

• [ ] Add the possibility of searching by providers/providers' acronym (especially if it recognizes provider name even if the provider name is not in the title or description)
• [x] Add the possibility of searching by two words together for eg. "EOSC Synergy" should find the first things related o both words/whole phrase
• [x] Add the highlights to search words/phrases
• [x] Assure efficient searching by
  • title (a piece of text or a cluster of words)
  • description
  • author (goal: full list of publications of entered author)
  • keyword

Input that we have: https://docs.google.com/spreadsheets/d/1LqWUNfL9dzjNd-34Kr29z9T1MS5icv0GX9p8wlWCjwA/edit#gid=0 Test Cases:

1. Keyword SROCC+software filter - it shows 5 results, where 1-3 are related to SOCC or SPOCC, and then 4 and 5 includes SROCC
2. Keyword GIS - typing GIS results in 43251 search results in All catalogs, but only one result includes keyword "GIS" (GIS Decalogue, category: Other)

Advanced Search (optional) Consider costs of extending the search service with "advanced search" OpenAire Explore-like. Possible fields in spreadsheet below:

https://docs.google.com/spreadsheets/d/13oklxLTH1c5bsa1iAQZqYwv1vnUHotuSqshm6AxfBvA/edit#gid=0

[agpul]

Additional use cases: https://docs.cyfronet.pl/display/FID/Search+Service+Workshop

[tomaszandel]

please change providers field to Tokenized in schema and reload the data so we can search using Tokenizer @MIchalKolomanski