chore: deprecate Answers components (#231)

Author: VladislavFitz

Sources/InstantSearchCore/Searcher/Answers/AnswersSearcher+FilterState.swift

@@ -8,11 +8,13 @@
 import Foundation
 import AlgoliaSearchClient
 
+@available(*, deprecated, message: "Answers feature is deprecated")
 public extension AnswersSearcher {
 
   /**
    Connection between AnswersSearcher and FilterState
    */
+  @available(*, deprecated, message: "Answers feature is deprecated")
   struct FilterStateConnection: Connection {
 
     public let searcher: AnswersSearcher
@@ -38,6 +40,7 @@ public extension AnswersSearcher {
 
 }
 
+@available(*, deprecated, message: "Answers feature is deprecated")
 public extension AnswersSearcher {
 
   /**

Sources/InstantSearchCore/Searcher/Answers/AnswersSearcher.swift

@@ -10,6 +10,7 @@ import Foundation
 /// An entity performing Answers search
 ///
 /// [Documentation](https://www.algolia.com/doc/guides/algolia-ai/answers/)
+@available(*, deprecated, message: "Answers feature is deprecated")
 public final class AnswersSearcher: IndexSearcher<AlgoliaAnswersSearchService> {
 
   public override var request: Request {
@@ -43,6 +44,7 @@ public final class AnswersSearcher: IndexSearcher<AlgoliaAnswersSearchService> {
 
 }
 
+@available(*, deprecated, message: "Answers feature is deprecated")
 extension AnswersSearcher: IndexNameSettable {
 
   public func setIndexName(_ indexName: IndexName) {

Sources/InstantSearchCore/Searcher/SearchService/AlgoliaAnswersSearchService.swift

@@ -7,6 +7,7 @@
 
 import Foundation
 
+@available(*, deprecated, message: "Answers feature is deprecated")
 public final class AlgoliaAnswersSearchService: SearchService {
 
   public let client: SearchClient
@@ -21,6 +22,7 @@ public final class AlgoliaAnswersSearchService: SearchService {
 
 }
 
+@available(*, deprecated, message: "Answers feature is deprecated")
 extension AlgoliaAnswersSearchService {
 
   public struct Request: IndexNameProvider, TextualQueryProvider, AlgoliaRequest {