TODO: write motivation behind this helper.Box shadow helper is a helper which draws box shadows, similar to CSS box-shadow property.
Demo
```lang=cpp
Breeze::BoxShadowHelper::boxShadow(
&painter,
QRect(300, 200, 200, 200),
QPoint(0, 50),
96,
QColor(0, 0, 0));
```
{F5754369, layout=center, size=full}