Allow Shapes Drawn With PaintingStyle.stroke to Register Hits Within Bounds

[Yey007]

Resolves #11... for the most part. There were a few shapes where I didn't really know what to do, like Path, Arc, and Line, since they're not always closed. The rest of the shapes, however, now let you specify whether you want to register hits within bounds even if that area is transparent. Let me know what you think!

[nateshmbhat]

Hi , thanks for your work. It's been some time since I worked on this. can you explain what is this bounds problem ur talking about with an example or something if possible ?

[Yey007]

Hi. To be honest, I moved away from Flutter for my use case. However, the original problem I was trying to solve was with closed shapes. Say you have a closed shape like a circle. If it's a circle that isn't filled in (with just the boundary of the circle drawn), HitTest currently does not register hits if the user clicks in that transparent region inside the circle but not on the boundary. This PR allows that behavior to be configured.

Looks like there are also some extra files committed in this PR that I didn't notice. If you're interested in this feature let me know and I'll try to clean things up.