add: notice message skeletal code

app/models/message_template/project_setting_changed.rb

@@ -0,0 +1,15 @@
+# == Schema Information
+#
+# Table name: message_templates
+#
+#  id         :integer          not null, primary key
+#  type       :string(255)
+#  sys_notice :text(65535)
+#  email      :text(65535)
+#  created_at :datetime         not null
+#  updated_at :datetime         not null
+#
+
+# 我管理的仓库项目设置被更改
+class MessageTemplate::ProjectSettingChanged < MessageTemplate
+end