feat: Initialize SwiftUIHTML library with core framework and examples

- Add SwiftUI-based HTML rendering framework with comprehensive tag system
- Implement core HTML tags (div, span, p, h1-h6, img, a, button, form elements)
- Include block and inline element support with CSS styling capabilities
- Add comprehensive example project with 30+ usage samples
- Provide multilingual documentation (English/Korean)
- Include unit tests with snapshot testing for visual validation
- Add .gitignore for Swift/Xcode project structure