Create vcpkg.json

[kcoul]

Here is what CLion / vcpkg integration looks like (trivially simple, but you might not want this to run automatically if you have a binary cache that will set up the build much more quickly than this will!)

Consider this a draft PR until we work out details of the dependency management options.

[kcoul]

There are also some lingering integration bugs in the vcpkg integration, I found this one today on Windows (you need to remember to check a hidden box to add vcpkg to existing profiles, which is counter-intuitive and not necessary on macOS/Linux):