Create a loading skeleton placeholder using Designsystemet styles.
Examples
ds_skeleton(variant = "text", width = "200px")
#> <div class="ds-skeleton" data-variant="text" style="width:200px" aria-hidden="true"></div>
ds_skeleton(variant = "circle", width = "50px", height = "50px")
#> <div class="ds-skeleton" data-variant="circle" style="width:50px;height:50px" aria-hidden="true"></div>