feat(武器): 添加鸡毛弓武器及相关箭矢功能

实现鸡毛弓武器系统，包括武器脚本、箭矢脚本和场景配置
修改实体伤害处理逻辑，分离普通伤害和子弹伤害方法
更新公鸡角色配置，添加鸡毛弓作为默认武器

scripts/Contents/Bullets/Bow.gd

@@ -0,0 +1,22 @@
+extends BulletBase
+class_name Bow
+
+var count: int = 0
+var atk: float = 0
+
+func spawn():
+	await TickTool.millseconds(250)
+	var startAngle = rotation - deg_to_rad(count * 10.0 / 2)
+	for c in count:
+		for i in BulletBase.generate(
+			ComponentManager.getBullet("Arrow"),
+			launcher,
+			position,
+			startAngle + deg_to_rad(c * 10)
+		):
+			var bullet: Arrow = i
+			bullet.atk = atk
+	tryDestroy()
+func ai():
+	PresetBulletAI.lockLauncher(self, launcher, true)
+	rotation = position.angle_to_point(get_global_mouse_position())