v1.6.0: Premium landing page redesign + missing files

index.html:
- Complete rebuild with premium UI/UX (no emojis, all SVG icons)
- Live interactive API console with preset endpoints and JSON viewer
- Canvas particle system (60 particles, purple-tinted)
- Scroll-reveal animations via IntersectionObserver
- Animated stat counters on viewport entry
- Infinite scrolling marquee with SVG icons
- Endpoint explorer with sidebar nav, multi-language code tabs (cURL/JS/Python)
- 4 interactive playground cards
- Glassmorphism sticky header with scroll-aware blur
- Full 4-column footer

404.html:
- Glitch animation effect on 404 code
- CRT scanline overlay
- SVG icons throughout

New files:
- manifest.json (PWA: theme color, icons, display)
- robots.txt (crawler directives + sitemap)
- sitemap.xml (4 pages)
- og-image.svg (gradient design with title)
- privacy.html (data collection, DMCA, third-party)
- tos.html (acceptable use, rate limits, liability, DMCA)

public/robots.txt

@@ -0,0 +1,6 @@
+# AniKatoAPI — https://anikato.vercel.app
+User-agent: *
+Allow: /
+Allow: /api
+
+Sitemap: https://anikato.vercel.app/sitemap.xml