feat: migrate workbench to React

workbench/client/src/ui/button.tsx

@@ -0,0 +1,12 @@
+import type { ButtonHTMLAttributes, PropsWithChildren } from 'react';
+export function Button({
+  children,
+  className = '',
+  ...props
+}: PropsWithChildren<ButtonHTMLAttributes<HTMLButtonElement>>) {
+  return (
+    <button className={`button ${className}`} {...props}>
+      {children}
+    </button>
+  );
+}