feat(datastructures): Enhanced tree visualizations with improved UX and animations

Enhanced all three tree visualizations (Binary, Heap, Red-Black) with comprehensive improvements:

Binary Tree Enhancements:
- Increased canvas size (1000×700) with larger nodes (30px radius)
- Enhanced deletion with visual feedback (amber replacement, red deletion highlights)
- Improved edge rendering with rounded caps
- Added comprehensive legend with 6 node type swatches
- Enhanced empty state with glassmorphism design
- Upgraded statistics display with gradient backgrounds
- Better traversal controls with step indicators

Heap Visualization Improvements:
- Expanded canvas (1200×600) for better visibility
- Added animation state management (inserting, bubbling-up, bubbling-down, extracting)
- Implemented heap type toggle (Max/Min) with live conversion
- Added comprehensive gradient system (7 gradients for different states)
- Real-time status messages with color-coded feedback
- Enhanced legend with 8 state types
- Improved array representation with step indicators
- Professional statistics cards with icons

Red-Black Tree Major Updates:
- Increased SVG height (700px) to accommodate height-7 trees
- Implemented full deletion functionality with deleteRB and deleteFixup
- Added rotation animations with purple-pink gradient highlighting
- Implemented recoloring animations with amber-yellow gradients
- Added status message bar with pulse animation
- Enhanced edge coloring (red edges for red children, gray for black)
- Comprehensive gradient system (6 gradients + 4 filters)
- Visual feedback for all tree operations
- Improved search highlighting
- Professional statistics cards with gradient backgrounds

All Visualizations:
- Consistent design language across all three components
- Smooth transitions and animations
- Better accessibility with clear visual feedback
- Production-ready polish
- Responsive layouts
- Enhanced error handling

Author: mnaimfaizy