feat(fsm): 添加有限状态机模块 (#327)

- 添加 IStateMachine 接口，支持泛型状态和上下文
- 添加 StateMachine 实现
- 支持状态定义 (onEnter/onExit/onUpdate)
- 支持转换定义和条件
- 支持事件监听 (onChange/onEnter/onExit)
- 添加 8 个蓝图节点:
  - GetCurrentState, TransitionTo, CanTransition
  - IsInState, WasInState, GetStateDuration
  - EvaluateTransitions, ResetStateMachine

packages/fsm/tsup.config.ts

@@ -0,0 +1,14 @@
+import { defineConfig } from 'tsup';
+
+export default defineConfig({
+    entry: ['src/index.ts'],
+    format: ['esm'],
+    dts: true,
+    sourcemap: true,
+    clean: true,
+    external: [
+        '@esengine/ecs-framework',
+        '@esengine/blueprint'
+    ],
+    tsconfig: 'tsconfig.build.json'
+});