Added classification for fhir item & product Search of categories/ fhir classification available https://api.akeneo.com/documentation/filter.html#on-their-categories https://api.akeneo.com/documentation/filter.html#on-categories
Example query /api/fhir/rest/v1/products?search={"categories":[{"operator":"IN","value":["LMIS","10000460","PRODUCTS_TO_TRADE_ITEMS"]}]}
/api/fhir/rest/v1/items?search={"categories":[{"operator":"IN","value":["LMIS","10000460","PRODUCTS_TO_TRADE_ITEMS"]}]}