add questionFilterOptions query

app/graphql/resolvers/question_filter_options_query_resolver.rb

@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+module Resolvers
+    class QuestionFilterOptionsQueryResolver
+      def initialize; end
+
+      def resolve
+        {
+          years: Question.distinct(:authorship_year).pluck(:authorship_year)
+        }
+      end
+    end
+  end