feat(HCN): 修改角色技能为击杀敌人时储能

修改HCN角色的技能触发机制，从召唤物死亡时储能改为击杀敌人时储能
更新角色描述和属性数值
更换角色默认武器为AcidWind
添加killEnemy信号到EntityBase用于触发击杀事件
为AcidWind武器添加升华选项

scripts/Statemachine/EntityBase.gd

@@ -5,6 +5,7 @@ signal hit(damage: float, bullet: BulletBase, crit: bool)
 signal healed(amount: float)
 signal healthChanged(health: float)
 signal died()
+signal killEnemy(who: EntityBase, by: BulletBase)
 
 signal energyChanged(energy: float, dontChangeDirection: bool)
 
@@ -170,6 +171,7 @@ func _ready():
 	)
 	healthChanged.emit(health)
 	energyChanged.emit(energy, false)
+	killEnemy.connect(func(): return )
 	spawn()
 func _process(_delta):
 	health = clamp(health, 0, fields.get(FieldStore.Entity.MAX_HEALTH))
@@ -446,6 +448,8 @@ func tryDie(by: BulletBase = null):
 	EffectController.create(ComponentManager.getEffect("DeadBlood"), texture.global_position).shot()
 	await die()
 	died.emit()
+	if is_instance_valid(by):
+		by.launcher.killEnemy.emit(self , by)
 	if isBoss:
 		UIState.showTip("[b]%s[/b] 已被打败！" % displayName, TipBox.MessageType.CONGRATULATION)
 	elif isPlayer():