feat(blueprint): 添加蓝图触发器系统 (#323)

* feat(blueprint): 添加蓝图触发器系统

- TriggerTypes: 定义触发器类型和上下文接口
  - tick/input/collision/message/timer/stateEnter/stateExit/custom
  - 各类型的上下文接口和工厂函数

- TriggerCondition: 触发条件系统
  - ITriggerCondition 接口
  - 复合条件 (CompositeCondition, NotCondition)
  - 通用条件 (AlwaysTrue, AlwaysFalse, TriggerType, EntityId)
  - 特定类型条件 (InputAction, MessageName, StateName, TimerId, CollisionEntity, CustomEvent)
  - ConditionBuilder 链式 API

- BlueprintTrigger: 触发器核心实现
  - IBlueprintTrigger 接口
  - BlueprintTrigger 实现类
  - TriggerRegistry 触发器注册表
  - 各类型触发器工厂函数

- TriggerDispatcher: 触发器调度系统
  - ITriggerDispatcher 调度器接口
  - TriggerDispatcher 实现
  - EntityTriggerManager 实体触发器管理器

* feat(blueprint): 添加触发器相关事件节点

- EventInput: 输入事件节点 (action/value/pressed/released)
- EventCollisionEnter/Exit: 碰撞事件节点
- EventMessage: 消息事件节点
- EventTimer: 定时器事件节点
- EventStateEnter/Exit: 状态机事件节点

packages/blueprint/src/nodes/events/EventTimer.ts

@@ -0,0 +1,70 @@
+/**
+ * @zh 定时器事件节点 - 定时器触发时调用
+ * @en Event Timer Node - Triggered when timer fires
+ */
+
+import { BlueprintNodeTemplate, BlueprintNode } from '../../types/nodes';
+import { ExecutionResult } from '../../runtime/ExecutionContext';
+import { INodeExecutor, RegisterNode } from '../../runtime/NodeRegistry';
+
+/**
+ * @zh EventTimer 节点模板
+ * @en EventTimer node template
+ */
+export const EventTimerTemplate: BlueprintNodeTemplate = {
+    type: 'EventTimer',
+    title: 'Event Timer',
+    category: 'event',
+    color: '#CC0000',
+    description: 'Triggered when a timer fires / 定时器触发时执行',
+    keywords: ['timer', 'delay', 'schedule', 'event', 'interval'],
+    menuPath: ['Event', 'Timer'],
+    inputs: [
+        {
+            name: 'timerId',
+            type: 'string',
+            displayName: 'Timer ID',
+            defaultValue: ''
+        }
+    ],
+    outputs: [
+        {
+            name: 'exec',
+            type: 'exec',
+            displayName: ''
+        },
+        {
+            name: 'timerId',
+            type: 'string',
+            displayName: 'Timer ID'
+        },
+        {
+            name: 'isRepeating',
+            type: 'bool',
+            displayName: 'Is Repeating'
+        },
+        {
+            name: 'timesFired',
+            type: 'int',
+            displayName: 'Times Fired'
+        }
+    ]
+};
+
+/**
+ * @zh EventTimer 节点执行器
+ * @en EventTimer node executor
+ */
+@RegisterNode(EventTimerTemplate)
+export class EventTimerExecutor implements INodeExecutor {
+    execute(node: BlueprintNode): ExecutionResult {
+        return {
+            nextExec: 'exec',
+            outputs: {
+                timerId: node.data?.timerId ?? '',
+                isRepeating: false,
+                timesFired: 0
+            }
+        };
+    }
+}