Support auto-resizing when scrollable enabled

[christophby]

Currently, auto-resizing is not supported as long as scrollable is enabled.
When scrollable is enabled, the default detent is set to 1, even when the content is smaller.

This prevents us from using this library because the height of the content in our bottom sheets varies.

It would be great if auto-resizing were supported for scrollable content too (e.g. when the scrollable content is only half the screen height).

[lodev09]

This will be supported on future version of TrueSheet. This is currently a limitation on RN Fabric itself, they've introduced support for this but it's not yet stable.