refactor(skill): 优化技能碰撞检测逻辑并移除重复命中检查

- 移除hitTargets集合及相关重复命中检查逻辑
- 改进碰撞检测日志输出，增加安全性检查
- 清理注释掉的旧攻击逻辑代码
- 在reset方法中添加碰撞器事件解绑

assets/resources/game/skill/atk/atk_s1.prefab

@@ -301,7 +301,7 @@
     "bullet": false,
     "awakeOnLoad": true,
     "_group": 1,
-    "_type": 2,
+    "_type": 1,
     "_allowSleep": false,
     "_gravityScale": 1,
     "_linearDamping": 0,

assets/resources/game/skill/atk/b_arrow_blue.prefab

@@ -513,7 +513,7 @@
     "tag": 0,
     "_group": 1,
     "_density": 1,
-    "_sensor": true,
+    "_sensor": false,
     "_friction": 0.2,
     "_restitution": 0,
     "_offset": {

assets/resources/game/skill/atk/m_water_ball_1.prefab

@@ -304,8 +304,8 @@
     "bullet": false,
     "awakeOnLoad": true,
     "_group": 1,
-    "_type": 2,
-    "_allowSleep": true,
+    "_type": 1,
+    "_allowSleep": false,
     "_gravityScale": 1,
     "_linearDamping": 0,
     "_angularDamping": 0,