Shorthand flex helpers added in Bootstrap 5.1. bs_hstack() lays children
out in a row, bs_vstack() in a column.
Examples
bs_hstack(bs_button(label = "A"), bs_button(label = "B"), gap = 2)
#> <div class="hstack gap-2">
#> <button class="btn btn-primary" type="button">A</button>
#> <button class="btn btn-primary" type="button">B</button>
#> </div>
bs_vstack(bs_alert("one"), bs_alert("two"), gap = 3)
#> <div class="vstack gap-3">
#> <div class="alert alert-primary" role="alert">one</div>
#> <div class="alert alert-primary" role="alert">two</div>
#> </div>