Add herregistratie page composed entirely from existing components

Demonstrates the atomic-design payoff: a whole new flow (route + page + nav
link) reuses page-layout, heading, alert, form-field, text-input, button and
link with no new component files.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/app/app.routes.ts

@@ -5,5 +5,6 @@ export const routes: Routes = [
   { path: 'login', loadComponent: () => import('./pages/login/login.page').then(m => m.LoginPage) },
   { path: 'dashboard', loadComponent: () => import('./pages/dashboard/dashboard.page').then(m => m.DashboardPage) },
   { path: 'registratie', loadComponent: () => import('./pages/registration-detail/registration-detail.page').then(m => m.RegistrationDetailPage) },
+  { path: 'herregistratie', loadComponent: () => import('./pages/herregistratie/herregistratie.page').then(m => m.HerregistratiePage) },
   { path: '**', redirectTo: 'login' },
 ];