Add a setting to ImageLoader that calls Image::reinterpret_stacked_2d_as_array

[grind086]

Objective

If you want to use a TilemapChunk (or more generally use a texture2DArray in a shader), you have to implement a mechanism that waits for your texture to load, then calls Image::reinterpret_stacked_2d_as_array.

Solution

Have the loader do it instead.

Testing

• Ran the updated examples

---

Showcase

let array_texture = asset_server.load_with_settings(
    "textures/array_texture.png",
    |settings: &mut ImageLoaderSettings| {
        settings.array_layout = Some(ImageArrayLayout::RowCount(4));
    },
);