🧪 Add AppDelegate testing infrastructure and initial tests

[hatimhtm]

🎯 What: This PR addresses the testing gap by creating a test target and initial tests for the AppDelegate class. It modifies the Xcode project to add Click2MinimizeTests and makes the isNewerVersion function accessible for testing.

📊 Coverage: The PR introduces testing coverage for AppDelegate.setupAppDict() ensuring the app dictionary initializes accurately, and thoroughly covers version string comparison in AppDelegate.isNewerVersion(_:currentVersion:) with edge cases for older, newer, identical versions, and irregular version lengths.

✨ Result: Test coverage for the AppDelegate functions is established, reducing regression risks during future modifications to core lifecycle hooks and settings behaviors.

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PR created automatically by Jules for task 14247322445131233872 started by @hatimhtm

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