[Draft] Apply multiple shadows in UIKit

[laminesm]

Platforms Impacted

• [ ] iOS
• [ ] macOS

Description of changes

I created a function that returns an array of layers with pre applied shadows. However, when I insert those sublayers to a card's base layer the shadows don't display at all.

Verification

(how the change was tested, including both manual and automated tests)

Before	After

Pull request checklist

This PR has considered:

• [ ] Light and Dark appearances
• [ ] iOS supported versions (all major versions greater than or equal current target deployment version)
• [ ] VoiceOver and Keyboard Accessibility
• [ ] Internationalization and Right to Left layouts
• [ ] Different resolutions (1x, 2x, 3x)
• [ ] Size classes and window sizes (iPhone vs iPad, notched devices, multitasking, different window sizes, etc)
• [ ] iPad Pointer interaction
• [ ] SwiftUI consumption (validation or new demo scenarios needed)
• [ ] Objective-C exposure (provide it only if needed)

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