feature(database-connection): Restructure frontend

frontend/src/components/Header/Header.tsx

@@ -0,0 +1,10 @@
+import React from 'react';
+import './Header.scss';
+
+const Header: React.FC = () => (
+  <div className="Header" data-testid="Header">
+    <p className="title">Humenius' TeamSpeak 3-Ranking</p>
+  </div>
+);
+
+export default Header;