feat: Implement Room Streaming System

- Add RoomStreamingManager to manage room loading and unloading based on player proximity.
- Create StreamingBudgetConfigSO for memory and performance budgeting of the streaming system.
- Introduce TransitionDirector to handle seamless and atmospheric fade transitions between rooms.
- Develop WorldGraph to represent room connectivity and facilitate neighbor queries and distance calculations.
- Implement RoomNode and RoomEdge classes to structure room data and connections.

Assets/_Game/Scripts/Enemies/StatusEffects/IStatusEffect.cs

@@ -0,0 +1,38 @@
+using UnityEngine;
+
+namespace BaseGames.Enemies.StatusEffects
+{
+    /// <summary>
+    /// 状态效果类型枚举。
+    /// </summary>
+    public enum StatusEffectType
+    {
+        Frozen,   // 冻结：停止移动、降低 BT Tick 频率
+        Sleep,    // 睡眠：受击即唤醒
+        Burning,  // 灼烧：持续扣血
+    }
+
+    /// <summary>
+    /// 状态效果接口。
+    /// 每种效果实现此接口，由 <see cref="EnemyStatusEffectManager"/> 统一管理生命周期。
+    /// </summary>
+    public interface IStatusEffect
+    {
+        StatusEffectType Type { get; }
+
+        /// <summary>持续时间（秒），负值 = 永久（直到手动移除）。</summary>
+        float Duration { get; }
+
+        /// <summary>效果是否已自然结束（超时或条件不满足）。</summary>
+        bool IsFinished { get; }
+
+        /// <summary>效果挂载到 enemy 时调用一次。</summary>
+        void OnApplied(EnemyBase enemy);
+
+        /// <summary>效果每帧 Tick（由 EnemyStatusEffectManager 驱动）。</summary>
+        void Tick(EnemyBase enemy, float deltaTime);
+
+        /// <summary>效果移除（超时 / 手动 / 死亡）时调用一次。</summary>
+        void OnRemoved(EnemyBase enemy);
+    }
+}