feat(Timer): add showHours prop support

[mrevanzak]

Summary

This PR adds support for the showHours property to the Voltra.Timer component, allowing users to control whether the timer displays hours when the duration exceeds 60 minutes.

Key Changes

• New Property: Added showHours (boolean) to the Timer component.
  • true: Displays H:MM:SS format (e.g., 1:34:00).
  • false (default): Displays MM:SS format, with minutes exceeding 60 (e.g., 94:00).
• Native Implementation: Updated VoltraTimer.swift to leverage SwiftUI's native showsHours parameter in Text(timerInterval:showsHours:).
• Manual Formatting: Updated DateComponentsFormatter in the native layer to respect the showHours setting when using custom textTemplates.
• Schema & Tooling:
  • Added showHours to data/components.json with short name mapping (shrs).
  • Regenerated TypeScript props and Swift parameters using npm run generate.
• Testing: Added unit tests in src/jsx/__tests__/Timer.node.test.tsx to verify prop serialization.

Verification Results

• ✅ All 172 tests passed (npm test).
• ✅ Build completed successfully (npm run build).
• ✅ Verified correct prop-to-shortname mapping in generated files.

Before	After

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