Feature: Add Snap Points Support to Bottom Sheet

[WASIM63]

✨ Feature: Add Snap Points Support to Bottom Sheet

Summary

This PR introduces a new snapPoints prop to react-native-raw-bottom-sheet, allowing the bottom sheet to open and snap to multiple defined positions.
The feature is backward-compatible — existing height usage still works.

---

🔥 New Features

• snapPoints prop
  Accepts an array of percentages or absolute numbers.

  snapPoints={['20%', '50%', '90%']}
  snapPoints={[200, 400, 600]}
  

Prop | Type | Description -- | -- | -- height | number | The height of bottom sheet (used if snapPoints not provided). snapPoints | array | Array of snap points (['20%', '50%', '90%'] or [200, 400, 600]). Overrides height. Method | Description -- | -- open(index?: number) | Opens the bottom sheet at a snap point. Defaults to last snap point. close() | Closes the bottom sheet.

<RBSheet
  ref={refRBSheet}
  snapPoints={['20%', '40%', '90%']}
  draggable={true}
  customStyles={{
    container: { borderTopLeftRadius: 20, borderTopRightRadius: 20 },
  }}>
  <View style={{padding: 20}}>
    <Text>Hello from snap points 👋</Text>
  </View>
</RBSheet>

// Open at 40% snap point
refRBSheet.current.open(1)