feat: add cash for storing searchresalts and hold them for working pagination. Now we are have offset for use on frontend

schema/query.graphql

@@ -33,6 +33,7 @@ type Query {
   get_shout(slug: String, shout_id: Int): Shout
   load_shouts_by(options: LoadShoutsOptions): [Shout]
   load_shouts_search(text: String!, options: LoadShoutsOptions): [SearchResult]
+  get_search_results_count(text: String!): CountResult!
   load_shouts_bookmarked(options: LoadShoutsOptions): [Shout]
 
   # rating

schema/type.graphql

@@ -276,3 +276,7 @@ type MyRateComment {
   my_rate: ReactionKind
 }
 
+type CountResult {
+  count: Int!
+}
+