PyObjC Framework InstallerPlugins

PyObjC is a bridge between Python and Objective-C, enabling Python scripts to interact with macOS frameworks and Cocoa libraries. The `pyobjc-framework-installerplugins` package provides Python wrappers specifically for the InstallerPlugins framework, which allows developers to extend the macOS installation process with custom steps and UI. The current version is 12.1, and PyObjC generally follows a release cadence tied to macOS SDK updates and Python version support, with major versions often introducing significant changes or dropping older Python support.