hostfxr_* Functions Return int Instead of StatusCode Enum

[ArthurVasseur]

Context: While developing with the Hostfxr library, I noticed that the hostfxr_* functions return an int rather than a StatusCode enum.
Problem:

Developers must manually redefine or map the possible return codes to understand and handle the status of the functions properly.
Even after downloading the .NET SDK (e.g., dotnet-sdk-8.0.301-win-x64.zip), the error_codes.h file is not included.

Thank you for considering this enhancement to the Hostfxr library!

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