Fixes #8136: Add plugin documentation and updated rake tasks.

> First, create a folder in `app/assets/javascripts/<plugin_name>` that is the plural version of the entity name (e.g. content-hosts). Follow by creating a file to hold the module definition and the resource.

Create a folder in `app/assets/javascripts/<plugin_name>` using the plural form of the entity name (i.e. content-hosts) and then create a file for both the module definition and the resource.