feat: add authentication and admin features

- Added `jose` library for JWT token generation and verification.
- Implemented login functionality with token storage using cookies.
- Created `HeaderAdmin` component for admin panel with login/logout capabilities.
- Developed `LoginForm` component for user authentication.
- Added `Table` component to display data with caching from localStorage.
- Introduced `SubHeaderAdmin` for additional admin actions.
- Enhanced `database.js` with functions for admin login and fetching table data.
- Updated `server.js` to handle new routes for login and table data retrieval.
- Modified `package.json` and `package-lock.json` to include new dependencies.

frontend/src/components/Home.tsx

@@ -5,11 +5,9 @@ import React from "react";
 
 const Home: React.FC = () => {
   return (
-    <>
-      <Layout title="MCS Lose - Registrieren">
-        <MainForm />
-      </Layout>
-    </>
+    <Layout title="MCS Lose - Registrieren">
+      <MainForm />
+    </Layout>
   );
 };