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/AI/BD_IsAiPhase.cs

@@ -0,0 +1,36 @@
+#if GRAPH_DESIGNER
+using UnityEngine;
+using Opsive.BehaviorDesigner.Runtime.Tasks;
+using Opsive.BehaviorDesigner.Runtime.Tasks.Conditionals;
+using BaseGames.Enemies;
+
+namespace BaseGames.Enemies.AI
+{
+    /// <summary>
+    /// BD Conditional：当前 AI 行为阶段是否与目标匹配。
+    ///
+    /// 常用于 Decorator Conditional Abort 或 Sequence 头部保护子树，
+    /// 例如只有在 <see cref="AiPhase.Patrol"/> 阶段时才执行巡逻序列。
+    /// </summary>
+    [TaskName("Is Ai Phase?")]
+    [TaskCategory("BaseGames/Enemy/State")]
+    [TaskDescription("检查当前 AI 行为阶段是否与目标枚举值匹配")]
+    public sealed class BD_IsAiPhase : Conditional
+    {
+        [Tooltip("目标 AI 行为阶段")]
+        [SerializeField] private AiPhase m_Phase = AiPhase.Patrol;
+
+        private EnemyBase _enemy;
+
+        public override void OnAwake() => _enemy = gameObject.GetComponent<EnemyBase>();
+
+        public override TaskStatus OnUpdate()
+        {
+            if (_enemy == null) return TaskStatus.Failure;
+            return _enemy.CurrentAiPhase == m_Phase
+                ? TaskStatus.Success
+                : TaskStatus.Failure;
+        }
+    }
+}
+#endif