聲明
func ScreenSingleRaycast(startPosition Vector2, distance float, layerMask List<int>, includeTrigger bool, out var hitEntity entity<Entity>, out var hitPosition Vector3, out var hitDistance float, out var hitNormal Vector3)
go螢幕觸控單返回射線檢測
透過螢幕觸控進行射線檢測，返回第一個命中實體