Add dxcompiler

Assets/raytrace/build.md

@@ -0,0 +1,5 @@
+Build:
+`node Kinc/make -g direct3d12 --raytrace dxr`
+
+Compile shader:
+`.\dxc.exe -Zpr -Fo ..\..\Bundled\raytrace\raytrace.cso -T lib_6_3 .\raytrace.hlsl`

Assets/raytrace/license.md

@@ -0,0 +1,8 @@
+Based on: https://github.com/microsoft/DirectX-Graphics-Samples/tree/master/Samples/Desktop/D3D12Raytracing
+
+Copyright (c) Microsoft. All rights reserved.
+This code is licensed under the MIT License (MIT).
+THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
+ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
+IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
+PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.