refactor ref/gestures

remove preserveScrollMomentum + scrollBuffer + lockableScrollableContentOffsetY props

we're using `preserveScrollMomentum` in the media picker, but i'm removing it because i feel the behavior is actually detrimental to the UX, and to simplify the refactor to scrollEnabled in the next commit.

`lockableScrollableContentOffsetY` is removed since it won't be necessary after the scrollEnabled refactor

`scrollBuffer` was no longer used.

removed custom gesture/scroll handling hooks

after refactoring to use scrollEnabled, we can add other props to add custom behaviors if needed.

refactored scroll/pan gesture interaction based on software-mansion/react-native-gesture-handler#420 (comment)

and approach from rngh example

https://github.com/software-mansion/react-native-gesture-handler/blob/main/example/src/new_api/bottom_sheet/index.tsx#L87

Author: yayvery