Add shader compiler for WebGPU

Use existing Vulkan compiler to generate SPIR-V and convert it into WGSL with tint compiler
https://github.com/google/dawn/releases/tag/v20260219.200501

Source/Editor/Cooker/Platform/Web/WebPlatformTools.cpp

@@ -43,7 +43,7 @@ DotNetAOTModes WebPlatformTools::UseAOT() const
 
 PixelFormat WebPlatformTools::GetTextureFormat(CookingData& data, TextureBase* texture, PixelFormat format)
 {
-    // TODO: texture compression for Web (eg. ASTC for mobile and BC for others?)
+    // Bundle raw textures
     return PixelFormatExtensions::FindUncompressedFormat(format);
 }