B2B-88: add starter kit structure and elements

packages/ui/src/shadcn/textarea.tsx

@@ -0,0 +1,21 @@
+import * as React from 'react';
+
+import { cn } from '../lib/utils';
+
+export type TextareaProps = React.ComponentPropsWithRef<'textarea'>;
+
+const Textarea: React.FC<TextareaProps> = ({ className, ...props }) => {
+  return (
+    <textarea
+      className={cn(
+        'border-input placeholder:text-muted-foreground focus-visible:ring-ring flex min-h-[60px] w-full rounded-md border bg-transparent px-3 py-2 text-sm shadow-xs focus-visible:ring-1 focus-visible:outline-hidden disabled:cursor-not-allowed disabled:opacity-50',
+        className,
+      )}
+      {...props}
+    />
+  );
+};
+
+Textarea.displayName = 'Textarea';
+
+export { Textarea };