change build system to CMake and use SDL3 for everything

libs/SDL3/src/render/direct3d11/D3D11_PixelShader_Advanced.hlsl

@@ -0,0 +1,7 @@
+
+#include "D3D11_PixelShader_Common.hlsli"
+
+float4 main(PixelShaderInput input) : SV_TARGET
+{
+    return AdvancedPixelShader(input);
+}