Thanks for this - much appreciated! I will give this a review when I have a moment.

Preliminarily, the macCatalyst and Linux checks are failing but the logs show some simple things that need fixing.

My goal with the library is to allow the main umbrella SwiftTimecode product/library to be imported no matter what platform the package is being built for (for simplicity and approachability), and have it simply import and export the compatible targets for the platform. Even though currently it would only be exporting TimecodeKitCore, it may gain additional Linux-compatible targets in the future.

Also, the swift-testing-extensions testing dependency was not Linux compatible but today I got it building for Linux.

I'll have a dive in here and see if I can make some tweaks so this is merge-ready.

Bingo. Linux CI job now builds and tests successfully. I'll merge to main if the other tests pass and release 3.1.0.