feat: Update all language homepages with modern theme - Update English, Turkish, German, and Russian homepages to match root index.md - Implement advanced hero section with code window and interactive elements - Add modern feature cards with 6 key capabilities - Include provider grid with AI and Storage providers - Add interactive quick start section with 3-step process - Implement modern documentation cards section - Add call-to-action section with GitHub integration - Ensure consistent modern design across all languages - Maintain language-specific content while using unified theme - All pages now have identical modern structure and styling

Author: byerlikaya