[7zip] Add missing Windows Header about vcpkg HOT 7 OPEN

IIRC these are not public API so no reason to install it.

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??

https://github.com/ip7z/7zip

Why not? Need them, works fine while using git, but with vcpkg these folders are missing.

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Need NFile, NDir, IInArchive, CPropVariant etc.

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Please share your usage.
NFile::/NDir::/CPropVariant are not exported from the DLL.

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Have some code based on

https://github.com/ip7z/7zip/blob/main/CPP/7zip/UI/Client7z/Client7z.cpp

within this code all these files are needed

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Again, this API is not exported from the DLL, so you will get linker errors if you attempt to use it.

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Please try to build the provide example [Client7z] from the git folder that also comes with the download from https://7-zip.org/a/7z2301.msi. Works like a charm. Trying to use this example with vspkg the build fails. For what reason i should not be able to build the provided examples? Even why is the example not part of the Package?

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