checkbox-indeterminate-24-regular

pnpm dlx shadcn@latest add https://opensourceicon.com/r/fluent/checkbox-indeterminate-24-regular.json

<svg xmlns="http://www.w3.org/2000/svg" width="96" height="96" viewBox="0 0 24 24"><path fill="currentColor" d="M6.25 3A3.25 3.25 0 0 0 3 6.25v11.5A3.25 3.25 0 0 0 6.25 21h11.5A3.25 3.25 0 0 0 21 17.75V6.25A3.25 3.25 0 0 0 17.75 3zM4.5 6.25c0-.966.784-1.75 1.75-1.75h11.5c.966 0 1.75.784 1.75 1.75v11.5a1.75 1.75 0 0 1-1.75 1.75H6.25a1.75 1.75 0 0 1-1.75-1.75zM7.25 6C6.56 6 6 6.56 6 7.25v9.5c0 .69.56 1.25 1.25 1.25h9.5c.69 0 1.25-.56 1.25-1.25v-9.5C18 6.56 17.44 6 16.75 6z"/></svg>