Adding minimumScaleFactor to HUD rendering

[mischreiber]

Platforms Impacted

• iOS
• visionOS
• macOS

Description of changes

Introducing a minimumScaleFactor to the text of a HUD. Using 0.6 as it strikes a good balance between adding a little extra space, and maintaining a reasonable level of readability.

Binary change

Total increase: 8,096 bytes
Total decrease: 0 bytes

File	Before	After	Delta
Total	31,486,872 bytes	31,494,968 bytes	⚠️ 8,096 bytes

Full breakdown

File	Before	After	Delta
HeadsUpDisplay.o	252,584 bytes	258,952 bytes	⚠️ 6,368 bytes
__.SYMDEF	4,881,264 bytes	4,882,992 bytes	⚠️ 1,728 bytes

Verification

Ensured text begins to overflow as expected, with a small amount of extra text available. Also verified a11y text sizes--no behavioral impact compared to the existing feature.

Visual Verification

Standard	Scaled

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)