Added the possibility to upload a file containing users to a group

src/pages/_app.tsx

@@ -5,6 +5,7 @@ import type {AppProps} from "next/app";
 import "primereact/resources/themes/lara-light-indigo/theme.css";
 import "primereact/resources/primereact.min.css";
 import "primeicons/primeicons.css";
+import "react-datepicker/dist/react-datepicker.css";
 import {useRouter} from "next/router";
 import {useEffect} from "react";
 import useExamStore from "@/stores/examStore";