src/core: move mach-core@9a4d09707d9f1cb6ea5602bdf58caeefc46146be package to here

Helps hexops/mach#1165

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

src/core/examples/sysgpu/deferred-rendering/fragmentWriteGBuffers.wgsl

@@ -0,0 +1,22 @@
+struct GBufferOutput {
+  @location(0) normal : vec4<f32>,
+
+  // Textures: diffuse color, specular color, smoothness, emissive etc. could go here
+  @location(1) albedo : vec4<f32>,
+}
+
+@fragment
+fn main(
+  @location(0) fragNormal: vec3<f32>,
+  @location(1) fragUV : vec2<f32>
+) -> GBufferOutput {
+  // faking some kind of checkerboard texture
+  let uv = floor(30.0 * fragUV);
+  let c = 0.2 + 0.5 * ((uv.x + uv.y) - 2.0 * floor((uv.x + uv.y) / 2.0));
+
+  var output : GBufferOutput;
+  output.normal = vec4(fragNormal, 1.0);
+  output.albedo = vec4(c, c, c, 1.0);
+
+  return output;
+}