feat(search): school type groups and a faith filter

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

nextjs-app/__tests__/components/ResultsToolbar.test.tsx

@@ -35,6 +35,7 @@ jest.mock('@/components/SchoolMap', () => ({ SchoolMap: () => <div data-testid="
 const filters = {
   local_authorities: ['Wandsworth'], school_types: ['Community school'], years: [],
   phases: ['Primary', 'Secondary'], genders: [], admissions_policies: [],
+  school_type_groups: [{ value: 'council', label: 'State school: council-run' }],
 };
 
 function results(): SchoolsResponse {
@@ -99,7 +100,7 @@ describe('the toolbar filters', () => {
   });
 
   it('counts only what More filters hides', () => {
-    params = new URLSearchParams('postcode=SW196AR&radius=1&school_type=Community+school&local_authority=Wandsworth');
+    params = new URLSearchParams('postcode=SW196AR&radius=1&school_type=council&local_authority=Wandsworth');
     render(<FilterBar filters={filters} />);
     expect(screen.getByRole('button', { name: /More filters \(1\)/ })).toBeInTheDocument();
   });