Added: ability to change fill type

[equinox2k]

Exposed ability to change fill type as per...

https://github.com/SixLabors/Shapes/issues/65

May need guide on the ImageSharp Graphics options side

@tocsoft

[CLAassistant]

All committers have signed the CLA.

[tocsoft]

fairly certain this won't be sufficient in all cases, because our render wont necessarily use the clipper internally.
We actually use

Shapes/src/SixLabors.Shapes/InternalPath.cs

Line 180 in 4f12a19

public int FindIntersections(PointF start, PointF end, Span<PointF> buffer)

to find intersections for filling purposes thats the one that will need to be modified to support the different fill types to determine inside outsideness.

[tocsoft]

the reason the cla stuff isn't working is because the commit is seen as being created by your petertribe account but then you've signed the CLA as equinox2k its your other account that will need to sign the CLA for it to allow the commit to be merged.

[petertribe]

@tocsoft sorted out cla eventually had to create the needed account on GitHub luckily was available :)

I may need help with the FindIntersections as not sure what exactly should be done.