feat: add react api and shadcn foundation

src/lib/components/ui/skeleton.tsx

@@ -0,0 +1,13 @@
+import { cn } from "$lib/utils"
+
+function Skeleton({ className, ...props }: React.ComponentProps<"div">) {
+  return (
+    <div
+      data-slot="skeleton"
+      className={cn("animate-pulse rounded-md bg-muted", className)}
+      {...props}
+    />
+  )
+}
+
+export { Skeleton }