vendored code

Local copies of code that cannot be pulled as part of the swiftpm build.

gguflib

This is https://github.com/antirez/gguf-tools/ commit hash af7d88d808a7608a33723fba067036202910acb3

json

This is https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz

metal-cpp

This comes from https://developer.apple.com/metal/cpp/ specifically:

• https://developer.apple.com/metal/cpp/files/metal-cpp_macOS14.2_iOS17.2.zip

Note that metal-cpp.patch has been applied to the contents of that zip.