Prefabcosm update: available, prototype, discontinued

We've added status designators to each model and variation page. The BURST* page is shown above, with status "prototype." Each model is designated as either:

available: can be purchased now (example: micro compact home)

prototype: includes concepts, demonstration homes, and models that will be available in the future (example: Aperture House)

discontinued: ... but worth tracking to see how the industry changes over time (example: v2shell)