Badge constructor
Create a Badge that stacks label on top of child.
If label is null then just a filled circle is displayed. Otherwise
the label is displayed within a StadiumBorder shaped area.
Implementation
const Badge({
  super.key,
  this.backgroundColor,
  this.textColor,
  this.smallSize,
  this.largeSize,
  this.textStyle,
  this.padding,
  this.alignment,
  this.offset,
  this.label,
  this.isLabelVisible = true,
  this.child,
});