Changes for method access level for handle swipe and simplified selector

[JerwinPRO]

What are the changes:

• Changed method access level: Changed @objc func handleSwipe to @objc private func handleSwipe - This prevents the method from being called directly from outside the class while keeping it accessible to Objective-C runtime (required for the selector).

• Simplified the selector: Changed #selector(ZoomAnimatedTransitioningDelegate.handleSwipe(:)) to #selector(handleSwipe(:)) - This is the modern Swift approach and is sufficient since the selector is being used within the same class

Why this work:

• The private access control modifier restricts direct method calls from outside the class
• The @objc attribute is retained because the method still needs to be exposed to the Objective-C runtime for the selector-based callback from UIPanGestureRecognizer
• The selector notation is simplified to just #selector(handleSwipe(_:)) which is cleaner and is the recommended Swift style