shadertools: Lighting module UBO

[felixpalmer]

Cherry pick of: #2159, #2166, #2169, #2170, #2171 & #2172

@ibgreen I had a quick play with the WebGPU variant of tutorials/lighting, but without success:

@fragment
fn fragmentMain(inputs: FragmentInputs) -> @location(0) vec4<f32> {
  return vec4<f32>(inputs.fragPosition, 1);
  var surfaceColor = vec3(1.0);
  surfaceColor = lighting_getLightColor2(surfaceColor, app.eyePosition, inputs.fragPosition, normalize(inputs.fragNormal));
  return vec4<f32>(surfaceColor, 1);
}