feat(lottie): add .lottie file ext support

[usmandevx]

Summary

• Add support for .lottie file extension in the Lottie widget
• Introduce custom decoder to handle .lottie (zip-based) format
• Maintain backward compatibility with existing .json animations

Key Changes

Lottie Support

• Detect .lottie file extension in Lottie widget
• Decode and extract animation data from .lottie files
• Reuse existing rendering pipeline for playback

Compatibility

• Ensure .json animations continue to work without changes
• Handle invalid or unsupported .lottie files gracefully

Usage Example

- Lottie:
    testId: animation
    source: Router.lottie
    styles:
      width: 200
      height: 200