First attempt at a GPU runner

Currently failing with an error I don't understand:

```
wgpu error: Validation Error

Caused by:
  In Device::create_shader_module, label = '...\image_binary.spv'

Shader '...\image_binary.spv' parsing error: InvalidTypeWidth(1)
```

examples/image-binary/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "image-binary"
+version.workspace = true
+authors.workspace = true
+edition.workspace = true
+license.workspace = true
+repository.workspace = true
+
+[dependencies]
+enkou-shaders = { path = "../../enkou-shaders" }
+glam.workspace = true
+spirv-std.workspace = true
+wgpu = { workspace = true, optional = true }
+
+[lints]
+workspace = true