feat(dashboard): show admin hints and add the hints admin page

src/App.jsx

@@ -8,6 +8,7 @@ import ImprintPage from './pages/ImprintPage';
 import Dashboard from "./pages/Dashboard.jsx";
 import RegistrationPage from './pages/RegistrationPage.jsx';
 import SettingsPage from './pages/SettingsPage.jsx';
+import AdminHintsPage from './pages/AdminHintsPage.jsx';
 import AdminUsersPage from './pages/AdminUsersPage.jsx';
 import GameLibrary from './pages/GameLibrary.jsx';
 import GameDetail from './pages/GameDetail.jsx';
@@ -73,6 +74,7 @@ function App() {
                         <Route path="/u/:name" element={<PublicProfilePage/>}/>
                         <Route path="/settings" element={<SettingsPage/>}/>
                         <Route path="/admin/users" element={<AdminUsersPage/>}/>
+                        <Route path="/admin/hints" element={<AdminHintsPage/>}/>
                         <Route path="/impressum" element={<ImprintPage/>}/>
                     </Routes>
                 </main>