feat(游戏平衡): 调整敌人生成和子弹行为

- 将敌人数量增长逻辑移至GameRule并调整计算公式
- 修改鸡的攻击行为，子弹现在会朝向玩家发射
- 调整子弹伤害值和旋转动画
- 减少玩家初始苹果数量并增加敌人掉落苹果数量
- 修改BOSS出现波数为第8波
- 移除无用属性和优化代码结构

scripts/Contents/Characters/Hen.gd

@@ -4,14 +4,16 @@ class_name Hen
 func _ready():
 	fields[FieldStore.Entity.MAX_HEALTH] = 75
 	fields[FieldStore.Entity.MOVEMENT_SPEED] = 0.25
+	fields[FieldStore.Entity.OFFSET_SHOOT] = 10
 	super._ready()
 
 func ai():
+	cooldownUnit = randi_range(1500, 4000)
 	move(currentFocusedBoss.position - position)
 	tryAttack(0)
 func attack(type):
 	if type == 0:
 		var weaponPos = findWeaponAnchor("normal")
 		for i in randi_range(1, 4):
-			BulletBase.generate(preload("res://components/Bullets/Star.tscn"), self, weaponPos, randf_range(0, PI * 2))
+			BulletBase.generate(preload("res://components/Bullets/Star.tscn"), self, weaponPos, (currentFocusedBoss.position - position).angle())
 	return true