Add Rotation option

[FMorschel]

Since Flutter also gives the rotation values for onScale of the GestureDetector, rotation animation could be added to the package. Rotation options could be added to the FloatingOverlayController. Since this also will work with mouse inputs, adding some configurations for detection width and optional padding for detecting mouse just outside the widget would be nice.

• Add finger rotation options.
• Add mouse rotation options.
• Create mouse reagion configuration options.