Add function to reset the slider values

[ajp8164]

Description

Add a function on the slider component to be able to reset the slider values for single and range slider.

Usage:

import Slider from 'react-native-ui-lib/slider';
...
const slider = useRef();
...
<Slider ref={slider} .../>
...
const resetSlider = () => {
  slider.current?.reset();
}

Changelog

Added ability to reset slider values programatically.