underline-solid

pnpm dlx shadcn@latest add https://opensourceicon.com/r/heroicons/underline-solid.json

<svg xmlns="http://www.w3.org/2000/svg" width="96" height="96" viewBox="0 0 24 24"><path fill="currentColor" fill-rule="evenodd" d="M5.995 2.994a.75.75 0 0 1 .75.75v7.5a5.25 5.25 0 1 0 10.5 0v-7.5a.75.75 0 0 1 1.5 0v7.5a6.75 6.75 0 1 1-13.5 0v-7.5a.75.75 0 0 1 .75-.75m-3 17.252a.75.75 0 0 1 .75-.75h16.5a.75.75 0 0 1 0 1.5h-16.5a.75.75 0 0 1-.75-.75" clip-rule="evenodd"/></svg>