Added new useScrollViewOffset hook

[Kwasow]

Description

This new hook makes it easy to create animations based on the offset of a ScrollView.

Interface:

export function useScrollViewOffset(
  aref: RefObject<Animated.ScrollView>
): SharedValue<number>

Checklist

• [x] Included code example that can be used to test this change
• [x] Updated TS types
• [ ] Added TS types tests
• [ ] Added unit / integration tests
• [x] Updated documentation
• [x] Ensured that CI passes