Support hitSlop for Naked Button

[dickermoshe]

Use case

Flutter really falls short in that it does not support any way of expanding the hit radius of a tappable surface for buttons.

Proposal

Implement a workaround for this issue using:

• An overlay (https://pub.dev/packages/hit_slop)
• A RenderProxyBox (https://github.com/gskinnerTeam/flutter-defer-pointer)

[tilucasoli]

I appreciate your suggestion; it makes sense. I'll add it to our board