Add official landing page and GitHub Pages deployment

[IchenDEV]

Summary

• Adds a production-grade official landing page at docs/index.html for the OpenType project
• Dark amber aesthetic with animated waveform hero, scroll-reveal sections, and full feature documentation
• Adds .github/workflows/pages.yml to auto-deploy docs/ to GitHub Pages on every push to main

Design

• Hero: Animated sound waveform with staggered CSS keyframe bars, full-viewport dark layout
• Typography: Cormorant Garamond (display) + IBM Plex Mono (technical/labels)
• Color: Near-black background, amber #F5A623 accent (sound/warmth), blue secondary
• Sections: Hero → Screenshot → How It Works → Output Modes → Features Grid → Tech Stack → Providers → Download CTA
• Interactions: IntersectionObserver scroll reveals, copy-to-clipboard for install command, nav active states

GitHub Pages Setup (after merge)

1. Go to Settings → Pages
2. Set Source to Deploy from a branch → main → /docs
   — OR let the included Actions workflow handle it automatically (requires Pages source set to GitHub Actions)

Test plan

• Verify docs/index.html renders correctly in browser
• Confirm screenshot menubar-popover.png loads from the same docs/ folder
• Enable GitHub Pages in repo settings and verify deployment succeeds
• Test responsive layout on mobile viewport

🤖 Generated with Claude Code