feat(timer): 添加定时器和冷却系统 (#325)

- 添加 ITimerService 接口和 TimerService 实现
- 支持一次性定时器和重复定时器
- 支持冷却系统 (startCooldown/isCooldownReady/getCooldownProgress)
- 添加 8 个蓝图节点:
  - StartCooldown, IsCooldownReady, GetCooldownProgress
  - ResetCooldown, GetCooldownInfo
  - HasTimer, CancelTimer, GetTimerRemaining

pnpm-lock.yaml

@@ -1897,6 +1897,34 @@ importers:
         specifier: ^5.0.8
         version: 5.0.8(@types/react@18.3.27)(react@18.3.1)(use-sync-external-store@1.6.0(react@18.3.1))
 
+  packages/timer:
+    dependencies:
+      tslib:
+        specifier: ^2.8.1
+        version: 2.8.1
+    devDependencies:
+      '@esengine/blueprint':
+        specifier: workspace:*
+        version: link:../blueprint
+      '@esengine/build-config':
+        specifier: workspace:*
+        version: link:../build-config
+      '@esengine/ecs-framework':
+        specifier: workspace:*
+        version: link:../core
+      '@types/node':
+        specifier: ^20.19.17
+        version: 20.19.25
+      rimraf:
+        specifier: ^5.0.0
+        version: 5.0.10
+      tsup:
+        specifier: ^8.0.0
+        version: 8.5.1(@microsoft/api-extractor@7.55.1(@types/node@20.19.25))(@swc/core@1.15.3)(jiti@2.6.1)(postcss@8.5.6)(tsx@4.21.0)(typescript@5.9.3)(yaml@2.8.1)
+      typescript:
+        specifier: ^5.8.3
+        version: 5.9.3
+
   packages/worker-generator:
     dependencies:
       chalk: