add Flag

Flag.tsx

@@ -0,0 +1,12 @@
+import { Country } from "@services/accounting-api";
+import { lazy, Suspense } from 'react';
+
+export default function Flag({ country, ...props }: { country: Country | "EU" }) {
+  const FlagIcon = lazy(() => import(`country-flag-icons/react/3x2`).then(module => ({ default: module[country] })));
+
+  return (
+    <Suspense fallback={<div {...props}>...</div>}>
+      <FlagIcon {...props}/>
+    </Suspense>
+  );
+}