feat: implement authentication login and registration pages with custom dark theme and icon support

components/ui/icon.tsx

@@ -0,0 +1,7 @@
+'use client';
+
+import { Icon as IconifyIcon } from '@iconify/react';
+
+export function Icon({ icon, className }: { icon: string; className?: string }) {
+  return <IconifyIcon icon={icon} className={className} />;
+}