feat(角色状态机): 重构角色状态系统为基于类的设计

新增通用状态类和职业专属状态类，将状态逻辑从状态机中解耦
添加状态注册机制，支持按职业配置状态
实现基础状态如待机、移动、跳跃、受击等
为剑士职业实现专属攻击状态
补充状态机开发说明文档

Game/include/character/states/jobs/swordman/SwordmanAttackState.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "character/states/CharacterStateBase.h"
+
+namespace frostbite2D {
+
+class SwordmanAttackState : public CharacterStateBase, public ICharacterActionStateNode {
+public:
+  SwordmanAttackState();
+
+  bool TryEnter(CharacterStateMachine& machine,
+                CharacterStateContext& context) override;
+  void OnEnter(CharacterStateMachine& machine,
+               CharacterStateContext& context,
+               CharacterStateId previousState) override;
+  void OnUpdate(CharacterStateMachine& machine,
+                CharacterStateContext& context) override;
+  void OnExit(CharacterStateMachine& machine,
+              CharacterStateContext& context,
+              CharacterStateId nextState) override;
+};
+
+} // namespace frostbite2D