Add support for vcpkg

[Molter73]

Handling dependencies in C/C++ projects can be a nightmare, vcpkg is a half decent package manager that can make this a lot easier, it would be great if we could use it with cachi2 for hermetic builds.

vcpkg can work with both source and binary packages, though I think sources are the one we want. Its CLI tool supports --only-download for fetching the source blobs that could be cached and --no-download for building with the pre-fetched dependencies. There's also asset caching that might be useful.

Lastly, the way vcpkg builds dependencies is handled by recipes hosted on https://github.com/microsoft/vcpkg, not sure if we need to mirror that into builds or in which way we could make it available to the build.

I'm not super familiar with the inner workings of cachi2, so if I can add any more context, please let me know.