Add sandbox page (redirect to etymology sandbox)

Author: lmrodriguezr

app/controllers/page_controller.rb

@@ -96,6 +96,11 @@ def linkout
     end
   end
 
+  # GET /page/sandbox
+  def sandbox
+    redirect_to(etymology_sandbox_names_path)
+  end
+
   private
 
     def help_topics

config/routes.rb

@@ -11,6 +11,7 @@
     %i[
       api about committee connect initiative join
       news prize publications seqcode linkout status
+      sandbox
     ].each { |i| get(i) }
   end
   get  'help' => 'page#help_index', as: :help_index