Adds support for custom checked icons in checkbox and option components#2425

rrambul wants to merge 3 commits intoshoelace-style:nextshoelace-style/shoelace:nextfrom

rrambul:renanrsilva/adds-support-for-custom-iconsrrambul/shoelace:renanrsilva/adds-support-for-custom-iconsCopy head branch name to clipboard