JamfCheck v2.4.0

• Moved from Swift 5 to Swift 6.
• Refreshed the interface for macOS Golden Gate with native Liquid Glass styling.
• Redesigned diagnostic sheets with clearer layouts, filters, and results.
• Updated Apple network requirements and improved APNs connectivity testing.
• Improved macOS software update detection.
• Improved Self Service+ detection and version reporting.
• Improved responsiveness, task cancellation, and error handling.
• Fixed diagnostic analyzer data disappearing when switching monitors.
• Resolved #26 #29 #30