Offset a closed curve until a given area is reached.

Input parameters:

1. Cr → Curve to offset.
2. Ar → Target area.
3. Pl → Optional offset plane.
4. Cs → Styling applied to kinky curve corners.
   • 0 → None
   • 1 → Sharp
   • 2 → Round
   • 3 → Smooth
   • 4 → Chamfer

Output parameters:

1. Cr → Offset curve.
2. Di → Offset distance used to obtain result.