Flesh out the demo "Superpowers Dummy" system

[elisee]

A demo system that does very little but exemplifies how it all works.

1. We could have a collaborative editor for an asset that's just a number, along with controls to increment and decrement it.
2. Then we could add a tool for configuring the increment/decrement step globally, using a resource.
3. Exporting the project could start a runtime that adds all the counters in the project together and displays the result.