add questionFilterOptions query

app/graphql/types/query_type.rb

@@ -8,6 +8,7 @@ module Types
     end
     field :subjects, SubjectType.connection_type, null: false
     field :reviewers, UserType.connection_type, null: false
+    field :question_filter_options, QuestionFilterOptionsType, null: false
     field :current_user, Types::UserType, null: true
 
     def questions(where: nil)
@@ -22,6 +23,11 @@ module Types
       Resolvers::ReviewersQueryResolver.new(context).resolve
     end
 
+
+    def question_filter_options
+      Resolvers::QuestionFilterOptionsQueryResolver.new.resolve
+    end
+
     def current_user
       context[:current_user]
     end

app/graphql/types/question_filter_options_type.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+module Types
+    class QuestionFilterOptionsType < Types::BaseObject
+      field :years, [String], null: false
+    end
+  end