xtool core libraries in a Swift Package.

This is a Swift Package that provides a set of utilities for Supercharge/xtool and vends a number of third-party dependencies (primarily, the libimobiledevice constellation).

The third-party dependencies are built via xtool-libs.

See the submodules of xtool-libs for individual licenses. Note that several dependencies are LGPL licensed, which means clients must link them dynamically (this is the default behavior if you depend on xtool-core.)