feat: add landing page copy and styles for English and Amharic versions

- Introduced `landing-copy.ts` containing text for the public landing page, supporting both English and Amharic languages.
- Added `landing.css` for styling the landing page, ensuring scoped styles to prevent conflicts with other app styles.
- Implemented smooth scrolling and animations for a better user experience.

apps/portal/src/app/components/LandingRoute.tsx

@@ -0,0 +1,15 @@
+import Cookies from 'js-cookie';
+import { LandingPage } from '@ema-platform/ui';
+import { authStorage } from '@ema-platform/auth';
+
+/**
+ * Public `/` — mounts the shared landing page with portal-specific routes.
+ * Auth state is read the same way ProtectedRoute does (token cookie or
+ * storage fallback) so the header can show "Go to dashboard" instead of
+ * Login/Sign Up without gating the route itself.
+ */
+export function LandingRoute() {
+  const token = authStorage.getToken() ?? Cookies.get('auth-token');
+
+  return <LandingPage primaryHref={token ? '/dashboard' : '/login'} signupHref="/signup" verifyHref="/verify" />;
+}