fullscreen from coolicons in Line with regular corners. maximize, expand, enlarge, focus, corners, resize, viewport. Other styles and corners: @coolicons/<style>/<radius>/fullscreen with line, duocolor, duotone, fill or bulk and sharp or round. Leave out regular, like @coolicons/fill/fullscreen, and use @coolicons/fullscreen for line with regular corners.
pnpm dlx shadcn@latest add "https://coolicons.cool/r/fullscreen.json"