Added Product Suggestions GraphQL Query Schema

Product suggestions can now be queried using the GraphQL API. Product discounts can now be retrieved by key, using the GraphQL API.

• [GraphQL API] Added the following types to the GraphQL schema: SearchKeywordArgument, SuggestResult, SuggestResultEntry, Suggestion.
• [GraphQL API] Changed the Query type:
  • Added the productProjectionsSuggest field to the Query type.
  • Argument key was added to Query.productDiscount field
  • Query.productDiscount(id) type changed from String! to String

The following changes were introduced in terms of GraphQL SDL:

extend type Query {
  productProjectionsSuggest(searchKeywords: [SearchKeywordArgument!]!, fuzzy: Boolean, limit: Int = 10, staged: Boolean = false): SuggestResult!
}

input SearchKeywordArgument {
  searchKeyword: String!
  locale: Locale!
}

type SuggestResult {
  searchKeywords: [SuggestResultEntry!]!
}

type SuggestResultEntry {
  locale: Locale!
  suggestions: [Suggestion!]!
}

type Suggestion {
  text: String!
}