fadd: repo edit unit

app/views/repositories/edit.json.jbuilder

@@ -5,3 +5,4 @@ json.project_description @project.description
 json.project_category_id @project.project_category_id
 json.project_language_id @project.project_language_id
 json.private !@project.is_public
+json.project_units @project.project_units.pluck(:unit_type)