Add code action to install vcpkg libraries when headers belonging to those libraries are detected

[sean-mcmanus]

If something like #include "zlib.h" isn't found in the include path and vcpkg is available, we could look up if a vcpkg library exists that contains the header and show a code action to install the library, which would resolve the missing include. Maybe we could also install vcpkg itself?

[bobbrow]

This was completed