Spins the image according to the rotation angle to produce a swirl pattern.

Make the image look like as if it has been swallowed by a swirl.
| Framework | Member |
|---|---|
| .NET | SwirlCommand |
| .NET 6+ | SwirlCommand |
| C DLL | L_SwirlBitmap |
| C++ Class Library | LBitmap::Swirl |