folder-plus from coolicons in Line with regular corners. directory, add, new, create. Other styles and corners: @coolicons/<style>/<radius>/folder-plus with line, duocolor, duotone, fill or bulk and sharp or round. Leave out regular, like @coolicons/fill/folder-plus, and use @coolicons/folder-plus for line with regular corners.
pnpm dlx shadcn@latest add "https://coolicons.cool/r/folder-plus.json"