408: Staging belt r=kyren a=kvark
Implementing the belt itself isn't too hard, but integrating it with the example framework and winit's event loop is somewhat challenging. Perhaps, there needs to be a `LocalSpawner` parameter to `render()` like I did [in vange-rs](e7bc944ef5/bin/boilerplate.rs (L26))?
Edit: code is all ready and shiny... but it does NOT work. Buffers don't come back from mapping for some reason.
Co-authored-by: Dzmitry Malyshau <kvarkus@gmail.com>
Co-authored-by: kyren <kerriganw@gmail.com>