[FIX]organization add created_at and total_count

app/views/organizations/organizations/_detail.json.jbuilder

@@ -8,4 +8,5 @@ json.visibility organization.visibility
 json.max_repo_creation organization.max_repo_creation
 json.num_projects organization.num_projects
 json.num_user organization.num_users
-json.avatar_url url_to_avatar(organization)
+json.avatar_url url_to_avatar(organization)
+json.created_at organization.created_on.strftime("%Y-%m-%d")

app/views/organizations/organizations/index.json.jbuilder

@@ -1,3 +1,4 @@
+json.total_count @organizations.total_count
 json.organizations @organizations do |organization|
   json.partial! "detail", organization: organization
 end

app/views/users/organizations/index.json.jbuilder

@@ -1,3 +1,4 @@
+json.total_count @organizations.total_count
 json.organizations @organizations do |organization|
   json.partial! "/organizations/organizations/detail", organization: organization
 end