fix: forward ref to KeyboardAwareScrollView (#345)

## 📜 Description

Right now it's impossible to assign `ref` on `KeyboardAwareScrollView`
and access `ScrollView` methods. This PR fixes this problem.

## 💡 Motivation and Context

It's important to have `ref` in many cases - so I think motivation why
it's needed is pretty clear 😅

The technical aspect is a little bit tricky, since internally we also
use `ref` (from REA hook) and we need to propagate it from inside the
component. To achieve this I added `onRef` callback that manages
everything 😎 It uses single ref and derives a reanimated ref + assigns
plain `ref` for typical RN usage.

This PR has a lot of changes, but it's because of prettier. Main changes
are `onRef` + `forwardRef` component wrap.

## 📢 Changelog

### JS

- `forwardRef` on `KeyboardAwareScrollView`;
- manage (clone) refs inside `KeyboardAwareScrollView` for reanimated
usage + assign it to forwarded ref;

## 🤔 How Has This Been Tested?

Tested manually on Xiaomi Redmi Note 5 Pro.

## 📝 Checklist

- [x] CI successfully passed
- [x] I added new mocks and corresponding unit-tests if library API was
changed