Konva Integration

Integrates uē-tôo camera controls with Konva.js. A red circle is drawn using Konva, while the board camera applies translation, rotation, and scale transforms to the Konva stage each frame.

• Scroll to zoom, Middle Mouse Drag or Space + Left Drag to pan
• Trackpad: Two-finger drag to pan, Pinch to zoom
• Touch: Two-finger drag to pan, Pinch to zoom
• The Konva stage transform is synchronized with the camera every frame