Enhance maze generation animation system with visual feedback during algorithm execution and a two-phase rendering approach:
- Phase 1: Preview mode displays simple blocks while algorithms run, with real-time feedback for path checking (valid/invalid/evaluating states)
- Phase 2: Sweep 3D modular pieces into place with pop-in animations
Updates:
- New MazeCellHighlight states (EvaluatingValid, EvaluatingInvalid) for algorithm feedback
- Modified all maze algorithms (DFS, Kruskal's, Prim's) to emit visual feedback when checking adjacent cells
- New animation components: HighlightLinger (self-destruct highlights) and PopInAnimation (juicy pop-in effect)
- Refactored MazeReworkSpawner to support preview prefabs and track spawned object state
- New prefabs: Stair room and MazeVisualize variants
- Added stepDelay and isPreviewMode controls to MazeAnimator for flexible pacing
- Reduced default maze size and adjusted material colors for testing
