Com.ForbiddenByte.OSA.Demos.Simple Namespace

Old name "SimpleTutorial". Class (initially) implemented during this YouTube tutorial: https://youtu.be/aoqq_j-aV8I (which is now old, but still useful to learn the basic concepts). It demonstrates a simple use case with items that expand/collapse on click. It uses the SimpleDataHelperT just so we won't need to spend time on lazily-initializing the models

Hookup between the DrawerCommandPanel and the adapter to isolate example code from demo-ing and navigation code