ADD: added database connection for players data handling and started login funtion with database

frontend/src/App.tsx

@@ -6,6 +6,7 @@ import Dashboard from './pages/Dashboard';
 import TournamentDetails from './pages/TournamentDetails';
 import Players from './pages/Players';
 import Navigation from './pages/Navigation';
+import TeamManagement from './pages/Teams';
 
 function App() {
   
@@ -19,6 +20,8 @@ function App() {
 
           {/* Geschützte Routen */}
           <Route path="/players" element={<ProtectedRoute><Players /></ProtectedRoute>} />
+          <Route path="/teams" element={<ProtectedRoute><TeamManagement /></ProtectedRoute>} />
+
           <Route path="/tournaments/:id" element={<ProtectedRoute><TournamentDetails /></ProtectedRoute>} />
         </Routes>
       </Router>