feat: GitHub Pages landing page with Yandex SEO optimization

- Terminal/cyberpunk aesthetic (JetBrains Mono + Space Grotesk)
- Interactive terminal demo with typing animation
- 12 feature cards synced with README
- Keyboard shortcuts section
- Architecture diagram, comparison table, CLI reference
- Stats counters with animated values
- Scroll progress bar, mouse glow, parallax effects
- Full SEO: JSON-LD, Open Graph, Yandex geo/icb, Russian keywords
- Noscript fallback for crawlers

Author: turkprogrammer