Render-api-v2 further enhancements

[JMS55]

Pixel should store and give out Rc<Device> and probably Rc<Queue> as well.

PixelBuilder should have a scaling_renderer_with_input_texture(texture: &TextureView) method, or don't store it in Pixel, and have the user construct it themselves.

[JMS55]

I'm conflicted on &Device vs Rc vs Arc honestly. I wish there was a good way to let the user choose what they need.

[parasyte]

I was thinking about this on the plane the other day. There is no requirement for pixels to own the wgpu context. It just makes using the library very easy by hiding much of the boilerplate.

The wgpu context can borrow structs owned by anything else. It's just a matter of keeping sane lifetimes. This would be exposed through a new method, like pixels::new_with_context. I'll try sketching the API sometime.

[JMS55]

That also works. I just ran into an issue where I need Arc, so this would be appreciated.

Also note that https://github.com/parasyte/pixels/blob/wip/render-api-v2/src/renderers.rs#L16 should be &Device