add school year model

src/App.tsx

@@ -77,6 +77,11 @@ const ViewRouteSitemapPage = lazy(() =>
 const ViewRoutePlaceholderPage = lazy(() =>
   import('./pages/ViewRoutePlaceholderPage').then((m) => ({ default: m.ViewRoutePlaceholderPage })),
 )
+const SchoolYearsManagementPage = lazy(() =>
+  import('./pages/administrator/SchoolYearsManagementPage').then((m) => ({
+    default: m.SchoolYearsManagementPage,
+  })),
+)
 const NavBuilderPage = lazy(() =>
   import('./pages/NavBuilderPage').then((m) => ({ default: m.NavBuilderPage })),
 )
@@ -1126,6 +1131,7 @@ export default function App() {
                   <Route path="administrator/communications" element={<CommunicationsIndexPage />} />
                   <Route path="administrator/configuration_view" element={<ConfigurationViewPage />} />
                   <Route path="administrator/configuration" element={<Navigate to="configuration_view" replace />} />
+                  <Route path="administrator/school-years" element={<SchoolYearsManagementPage />} />
                   <Route path="administrator/discounts" element={<DiscountListPage />} />
                   <Route path="administrator/discounts/create" element={<DiscountCreatePage />} />
                   <Route path="administrator/discounts/apply" element={<DiscountApplyVoucherPage />} />