Feat: Implement image editor tool with advanced features

[Anuragtech02]

• Refactored image editor architecture with component separation:

  • Created ImageEditor.svelte as main orchestrator component
  • Split UI into EditorCanvas, EditorSidebar, EditorToolPanel components
  • Added CropTopToolbar and CropBottomBar for crop-specific controls
  • Added MobileToolbar for responsive design

• Enhanced Crop.svelte with professional functionality:

  • Fixed coordinate system to use stage coordinates instead of image-space
  • Implemented proper visual overlay with cutout effect using Konva groups
  • Added rotation-aware highlight that syncs with crop tool transforms
  • Optimized caching strategy for smooth drag/resize interactions
  • Added aspect ratio constraints (Free, 1:1, 4:3, 16:9, 3:2, 9:16)
  • Implemented successive crops with coordinate accumulation
  • Added rotate left/right and flip horizontal/vertical controls

• Fixed critical rendering issues:

  • Resolved container mounting timing problems
  • Fixed highlight detachment during interactions
  • Eliminated checkerboard pattern in crop area
  • Proper layer management with moveToTop() for z-ordering

• Updated imageEditorStore with new functionality:

  • Added imageGroup state for container management
  • Implemented cleanupTempNodes for proper tool cleanup
  • Added takeSnapshot for history management
  • Enhanced undo/redo support

• UI improvements:

  • Added undo/redo buttons to main toolbar
  • Centered crop toolbar with better visual hierarchy
  • Icon-only rotate/flip buttons for cleaner interface
  • Aspect ratio presets with visual feedback