Add maze generation visualization with 2-phase animation

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

Assets/Prefabs/Environment/Hall/MazeVisualize 1 1 1.prefab

@@ -0,0 +1,63 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!1001 &2921409242878097755
+PrefabInstance:
+  m_ObjectHideFlags: 0
+  serializedVersion: 2
+  m_Modification:
+    serializedVersion: 3
+    m_TransformParent: {fileID: 0}
+    m_Modifications:
+    - target: {fileID: 1196592758819373226, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_Name
+      value: MazeVisualize 1 1 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalPosition.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalPosition.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalPosition.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalRotation.w
+      value: 1
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalRotation.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalRotation.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalRotation.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalEulerAnglesHint.x
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalEulerAnglesHint.y
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6505778898445912368, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: m_LocalEulerAnglesHint.z
+      value: 0
+      objectReference: {fileID: 0}
+    - target: {fileID: 6572798831050454820, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}
+      propertyPath: 'm_Materials.Array.data[0]'
+      value: 
+      objectReference: {fileID: 2100000, guid: 4f17acdef989a4d4fa161356b68eba35, type: 2}
+    m_RemovedComponents: []
+    m_RemovedGameObjects: []
+    m_AddedGameObjects: []
+    m_AddedComponents: []
+  m_SourcePrefab: {fileID: 100100000, guid: c39adeeb3a17d824392cc018d65aedc4, type: 3}