feat(ui): add skeleton component to shadcn-io exports

Export new Skeleton component from shadcn-io directory and add comment about potential future organization

packages/ui/src/components/index.ts

@@ -96,5 +96,7 @@ export * from './ui/button'
 export * from './ui/command'
 export * from './ui/dialog'
 export * from './ui/popover'
+// May group them in shadcn-io/index.ts ?
 export * from './ui/shadcn-io/dropzone'
+export * from './ui/shadcn-io/skeleton'
 export * from './ui/shadcn-io/tabs'

packages/ui/src/components/ui/shadcn-io/skeleton/index.tsx

@@ -0,0 +1,7 @@
+import { cn } from '@cherrystudio/ui/utils'
+
+function Skeleton({ className, ...props }: React.ComponentProps<'div'>) {
+  return <div data-slot="skeleton" className={cn('bg-accent animate-pulse rounded-md', className)} {...props} />
+}
+
+export { Skeleton }