directory for git submodules * cpr: curl for people, used by lokinet-bootstrap toolchain (to be removed) * cxxopts: cli argument parser (to be removed) * ghc-filesystem: `std::filesystem` shim lib for older platforms (like macos) * ngtcp2: quic implementation * nlohmann: json parser * oxen-encoding: [bencode](https://www.bittorrent.org/beps/bep_0003.html#bencoding)/endian header-only library * oxen-logging: spdlog wrapper library * oxen-mq: zmq wrapper library for threadpool and rpc * pybind11: for pybind modules * sqlite_orm: for peer stats db * uvw: libuv header only library for main event loop