Updated 14 documentation files covering major feature additions:
- Query editor: execution target picker, history time range filter
- Data grid: copy with headers, column reordering, binary hex viewer
- MongoDB: database/collection deletion, metadata display, use command
- Redis: command history navigation, text selection, slowlog panel
- AI assistant: searchable model dropdown, prompt history navigation
- Database support: PrestoSQL
- Keyboard shortcuts: Ctrl+P quick open for database objects
- Replace VitePress with Fumadocs + Next.js for documentation site
- Configure i18n (English + 简体中文) with language switcher
- Migrate all 17 guide documents to MDX format with updated content
- Add ocean theme, GitHub/Discord/QQ social links
- Update GitHub Actions workflow for Next.js static export
- Update .gitignore for .next, out, .source directories