feat(武器): 新增蓝水晶武器及相关调整

- 添加蓝水晶武器资源及配置
- 调整蓝水晶子弹的生命周期和追踪速度
- 修改数学工具中的随机数生成逻辑
- 更新钻石子弹的穿透属性和生命周期
- 将蓝水晶武器添加到角色武器库中

scripts/Contents/Bullets/BlueCrystal.gd

@@ -9,7 +9,7 @@ func ai():
 		var tracker = tracer.getTrackingAnchor()
 		var targetAngle = position.angle_to_point(tracker)
 		trail.rotation = - Vector2.from_angle(rotation).angle_to(Vector2.from_angle(targetAngle)) * 0.75 / (speed / initialSpeed)
-		PresetBulletAI.trace(self, tracker, 0.05)
+		PresetBulletAI.trace(self, tracker, 0.07)
 	else:
 		trail.rotation = 0
 	speed += 0.1

scripts/Tools/MathTool.gd

@@ -22,7 +22,7 @@ static func signBeforeStr(value: float):
 static func percent(value: float):
 	return value / 100
 static func shrimpRate(value: float):
-	return randi_range(0, floor(value)) + int(rate(value - floor(value)))
+	return floor(value) + int(rate(value - floor(value)))
 static func getClosestIntersection(a: Vector2, b: Vector2, r: float) -> Vector2:
 	var ab = b - a
 	var distance = ab.length()