Add basic macOS driver updater implementation

[JusterZhu]

Summary

Replace the pure-placeholder macOS updater with a working BaseDriverUpdater subclass that supports .kext, .dext, and .pkg driver formats.

Changes

• MacOsGeneralDrivelution inherits BaseDriverUpdater instead of throwing PlatformNotSupportedException
• InstallCoreAsync supports .kext (kextload), .dext (systemextensionsctl), .pkg (installer)
• File-level operations (backup, hash, compatibility) work out of the box from base class
• Rollback restores backed-up kernel extensions
• sudo permission check via pipeline step

Closes #294