feat(admissions): add admissions guide page and homepage countdown strip

- New /admissions route with AdmissionsView client component
- Live countdowns (days until) to Primary/Secondary deadlines and Offer Days
- Step-by-step timelines for both tracks with highlighted milestone rows
- Tips section covering equal preference rule, late applications, waiting lists
- Homepage countdown strip (4 cards) between discovery chips and how-it-works
- Admissions nav link and footer link added

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

nextjs-app/app/admissions/page.tsx

@@ -0,0 +1,14 @@
+import type { Metadata } from 'next';
+import { AdmissionsView } from '@/components/AdmissionsView';
+
+export const dynamic = 'force-static';
+
+export const metadata: Metadata = {
+  title: 'School Admissions Guide',
+  description:
+    'Understand the Primary and Secondary school admissions process in England, with live countdowns to every key deadline and National Offer Day.',
+};
+
+export default function AdmissionsPage() {
+  return <AdmissionsView />;
+}