Forward taps/drag events to widgets in backgroundBuilder

[large]

What could be improved

Makes Flame easier to implement normal Flutter widgets and still make it possible to Flame Game() to draw effects on top, like particles.

Why should this be improved

Integration between Flutter Widgets & Flame would make it look like a more whole product.
Since overlays are not part of underlaying effects etc.

Risks

Probably needs a new component like BackgroundHitbox() and other collision objects would not work in this area.

More information

No response

Other

• Are you interested in working on a PR for this?