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/backoffice/src/app/router/index.tsx

@@ -15,6 +15,7 @@ import {
 import { AuthLayout } from '../layouts/AuthLayout';
 import { BackofficeLayout } from '../layouts/BackofficeLayout';
 import { ProtectedRoute } from './ProtectedRoute';
+import { LandingRoute } from './LandingRoute';
 import { DashboardPage } from '../features/dashboard/pages/DashboardPage';
 import UserManagementPage from '../features/user-management/UserManagementPage';
 import { ProfilePage } from '../features/profile/pages/ProfilePage';
@@ -61,7 +62,7 @@ const router = createBrowserRouter([
     ],
   },
   { path: '/um/*', element: <UserManagementPage /> },
-  { path: '/', element: <Navigate to="/dashboard" replace /> },
+  { path: '/', element: <LandingRoute /> },
   { path: '/profile-setup', element: <Navigate to="/dashboard" replace /> },
   {
     element: <ProtectedRoute />,
@@ -69,7 +70,6 @@ const router = createBrowserRouter([
       {
         element: <BackofficeLayout />,
         children: [
-          { index: true, element: <Navigate to="/dashboard" replace /> },
           { path: 'dashboard', element: <DashboardPage /> },
           { path: 'vessel-registration-head-dashboard', element: guard([P.VIEW_VESSEL_REGISTRY], <VesselRegistrationHeadDashboardPage />) },
           { path: 'logistics-head-dashboard', element: guard(APPLICATION_QUEUE, <LogisticsHeadDashboardPage />) },