feat: add bookmark view modes (card/tile/cover) and enhance button block with visual config modal
- Added three view modes for bookmark blocks: card (default with side image), tile (compact horizontal), and cover (large top image)
- Implemented view mode submenu in block context menu with visual indicators for active mode
- Enhanced bookmark favicon handling with fallback logic and error state tracking
- Refactored button block with inline visual editor replacing text inputs
- Created Button
Bruno Charest
6b47ec39ff