[UIPKGE] Header-grade search/command palette. Bundles the slim trigger button (with platform-aware ⌘K/Ctrl-K kbd hint) AND the modal CommandDialog into one block; consumers drop it once and the global keyboard shortcut wires itself. Takes a `groups` array of `{ heading, items: [{ label, hint, icon, onSelect
pnpm dlx shadcn@latest add "https://registry.directory/r/uday-a/command-palette.json"