Feature Request: Implicitly-Animated Children

[RyanRamchandar]

Feature Request: Implicitly-Animated Children

Need
When I toggle a flag to show or hide a widget inside ResizableContainer, the child pops in/out with no transition. It would be great if the package could animate that change automatically (à la AnimatedSwitcher).

Suggested API

ResizableContainer(
  size: _size,
  animateChildren: true,          // NEW – defaults to false
  childTransitionBuilder: _,      // optional custom transition
  child: …,
)

If animateChildren is true, the container wraps its child in an implicit animation (fade / scale by default) whenever the child or ResizeableSize changes for example.

Why

Smoother UX for simple show/hide use-cases.
Backwards-compatible: existing code keeps working with animateChildren left at false.
Thanks for considering!