adding functions for loading indicator

client/app/components/LoadingIndicator.tsx

@@ -0,0 +1,13 @@
+export default function LoadingIndicator({ label = "Loading" }: { label?: string }) {
+  return (
+    <div
+      role="status"
+      aria-label={label}
+      className="fixed inset-0 z-50 flex items-center justify-center bg-black/40"
+    >
+      // change the size of the indicater and color
+      <div className="h-12 w-12 animate-spin rounded-full border-4 border-white border-t-transparent" />
+      <span className="sr-only">{label}</span>
+    </div>
+  );
+}