feat(武器): 重做链式机枪并添加音效

重构链式机枪的子弹生成逻辑，降低散射衰减系数
添加射击音效资源及导入配置
调整武器属性描述和数值
移除测试用的调试代码

scripts/Contents/Bullets/ChainGun.gd

@@ -1,16 +1,21 @@
 extends BulletBase
 
-var count: int = 1
-var splits: float = 10.0
+var count: int = 0
+var splits: float = 0
 
 @onready var anchor: Node2D = $"%anchor"
 
 func spawn():
 	for j in count:
-		for i in BulletBase.generate(ComponentManager.getBullet("PurpleCrystalSmall"), launcher, anchor.global_position, rotation):
+		for i in BulletBase.generate(
+			ComponentManager.getBullet("PurpleCrystalSmall"),
+			launcher,
+			anchor.global_position,
+			rotation + deg_to_rad(splits * randf_range(-1, 1))
+		):
 			if i is BulletBase:
 				var dir = Vector2.from_angle(i.rotation).rotated(deg_to_rad(-90))
 				i.baseDamage = baseDamage
-				i.position += dir * (count - j * 2) * splits / 2
+				i.position += dir * (count - j * 2) * 10 / 2
 func ai():
 	PresetBulletAI.lockLauncher(self, launcher, true)

scripts/Contents/Bullets/Volcano.gd

@@ -27,7 +27,8 @@ func generateShadow():
 			launcher,
 			position,
 			startAngle + i * deg_to_rad(splitAngle),
-			false, false, true, true
+			true,
+			true
 		):
 			if bullet is VolcanoShadow:
 				bullet.baseDamage = baseDamage * dmg5