Remove dependency on the retired Direct3D Extensions library

[BinToss]

https://walbourn.github.io/directx-sdks-of-a-certain-age/
This details parts of the DirectX SDK that are no longer built into the operating system.

https://walbourn.github.io/where-is-the-directx-sdk-2021-edition/

Use Microsoft/DirectXTK until we can completely remove D3DX dependency.
Only for D3DX10 and D3DX11...

Use https://www.nuget.org/packages/Microsoft.DXSDK.D3DX for SDK and redist

[BinToss]

DirectX SDK Includes

header/inl	Included in Win10	Alternatives
d3d9.h
d3d9caps.h
d3d9types.h
d3dx9.h	no
d3dx9anim.h	no
d3dx9core.h	no
d3dx9effect.h	no
d3dx9math.h	no	DirectXMath, XNAMath
d3dx9math.inl	no	DirectXMath, XNAMath
d3dx9mesh.h	no	DirectXMesh
d3dx9shader.h	no
d3dx9shape.h	no
d3dx9tex.h	no	DirectXTex
d3dx9xof.h	no
dinput.h
rpcsal.h

I really should be building a list of references rather than files.

d3dx9xof.h likely refers to D3DX X File Interfaces

[BinToss]

Imports

See the new wiki entry, Dependencies