Create Page Builder Showcase

[mikeschinkel]

This will be a WPLib Box Installable Package using the "In the box" CLI.

It will follow the to-be-developed "Installable Packages" standard for WPLIb Box.

The goal of this take is to discover what it takes to make a workable Showcase of many different plugins of a similar type and also to ensure it installs in a WPLib Box w/o potential for error and will be easy to maintain.