Add progress color

[JonatasAmaral]

Add functionality to show a progress-bar color

<input type="range" />
<input type="range" value="50" max="100" style="--progress: 50%" />

$progress-color: #ABE188;
$progress-value: var(--progress);

Also enable thumb's background-image

$thumb-background: url("/images/icons/home--custom-slider-thumb.svg");