feat: redesign landing page - cleaner layout, trust section repositioned

- Simplify hero section with concise developer-focused copy
- Add social proof strip (stars, countries, orgs) above fold
- Reposition trust section higher with 2-col layout (map + star chart)
- Move country chips to full-width row below map for balanced columns
- Replace hero stars badge with downloads badge (fix element ID)
- Remove redundant sections (comparison, use cases)
- Trim features 10 to 6, FAQ 9 to 6
- Fix hero secondary button visibility without hover

Author: prakersh