This plugin adds support for inserting a template into the composer window via a UI.
Based on cpradio's Checklist Plugin
I have a working plugin. It puts a button in the composer that will let you select from several templates. However, if you want to change the templates, you have to edit the code, so I have a bit more to learn to make a template editing interface in settings. This isn't bad for a days' work, though.
I still don't recommend that anyone use this.
Follow the directions at Install a Plugin using https://github.com/pfaffman/discourse-plugin-template-manager.git as the repository URL.
Jay Pfaffman
GNU GPL v2