refactor: 优化参数命名并调整角色属性

- 将匿名函数参数从 `_who`, `_by` 简化为 `_w`, `_b`
- 更新 HCN 角色的字段和数值配置
- 调整 MuyangDog 角色的数值和描述文本

scripts/Contents/Characters/HCN.gd

@@ -3,6 +3,6 @@ extends PlayerBase
 func register():
 	super.register()
 	killEnemy.connect(
-		func(_who, _by):
+		func(_w, _b):
 			storeEnergy(1)
 	)

scripts/Statemachine/EntityBase.gd

@@ -171,7 +171,7 @@ func _ready():
 	)
 	healthChanged.emit(health)
 	energyChanged.emit(energy, false)
-	killEnemy.connect(func(): return )
+	killEnemy.connect(func(_w, _b): return )
 	spawn()
 func _process(_delta):
 	health = clamp(health, 0, fields.get(FieldStore.Entity.MAX_HEALTH))