add: project edit transfer

app/views/repositories/edit.json.jbuilder

@@ -10,3 +10,6 @@ json.project_units @project.project_units.pluck(:unit_type)
 json.lesson_url @project.lesson_url
 json.permission render_permission(current_user, @project)
 json.is_transfering @project.is_transfering
+json.transfer do 
+  json.partial! "/users/user_simple", locals: {user: @project&.applied_transfer_project&.owner}
+end

app/views/users/_user_simple.json.jbuilder

@@ -1,5 +1,9 @@
+if user.present?
   json.id user.id
   json.type user.type
   json.name user.real_name
   json.login user.login
   json.image_url url_to_avatar(user)
+else 
+  json.nil!
+end