Provide a way to get ScrollController of scrollview from outside of ScrollableSheet

[fujidaiti]

Discussed in #112

^{Originally posted by QuentinSc May 5, 2024}
Hello,

I can't find a way to get the implicit ScrollController.
I tried PrimaryScrollController.of(context).

Could be usefule to trigger an animateTo to a specific offset of the scrollcontroller

Use case : scroll to a specific house in the airbnb cookbook

Thank you !

[fujidaiti]

A workaround: #112 (reply in thread)