feat(武器): 添加河豚刺针武器及其相关资源

新增河豚刺针武器，包含以下内容：
- 添加河豚武器图标和音效资源
- 实现Needle子弹类及其反弹逻辑
- 创建Hetun武器类实现散射攻击
- 添加子弹特效和碰撞检测
- 更新公鸡角色默认武器配置

scripts/Contents/Weapons/Hetun.gd

@@ -0,0 +1,20 @@
+@tool
+extends Weapon
+
+func update(to: int, origin: Dictionary, _entity: EntityBase):
+	origin["atk"] += 3 * to * soulLevel
+	origin["count"] += 5 * (soulLevel - 1)
+	origin["penerate"] += 0.1 * (soulLevel - 1)
+	return origin
+func attack(entity: EntityBase):
+	for i in readStore("count"):
+		for bullet in BulletBase.generate(
+			ComponentManager.getBullet("Needle"),
+			entity,
+			entity.findWeaponAnchor("normal"),
+			entity.findWeaponAnchor("normal").angle_to_point(get_global_mouse_position()) + deg_to_rad(randf_range(-1, 1) * 30)
+		):
+			if bullet is NeedleBullet:
+				bullet.baseDamage = readStore("atk")
+				bullet.penerate = readStore("penerate")
+	return true

scripts/Contents/Weapons/Hetun.gd.uid

@@ -0,0 +1 @@
+uid://tfptal3sgfmy