Restructure Suggestions for Smart Suggest/Autocomplete requests

[TheKeymaster]

Relevant is

• Request parameters
• Response objects/additional properties
• (Validating the Response against some Json schema)*

*Maybe it is also useful to validate the Json from FINDOLOGIC again, but I am unsure if it makes sense or not, since FINDOLOGIC should always respond with correctly validated data. Also if the search response will be updated, a response might cause an exception since it is no longer schema conform.

[TheKeymaster]

Actually we should introduce multiple suggestions. Not only a „Suggestion“, but a „PromotionSuggestion“ or „ProductSuggestion“, etc.