feat: refactor routing and enhance tenant service integration

- Updated app routing to redirect to the store feature and load children routes correctly.
- Enhanced app styles with tenant-specific branding and loading states.
- Improved app component to dynamically set CSS variables based on tenant colors.
- Refactored store layout components to simplify logo handling and improve accessibility.
- Updated tenant service to manage state more effectively and handle SSR scenarios.
- Added tests for tenant service and layout components to ensure proper functionality.
- Introduced a new SSR cache store for tenant state management.
- Enhanced button styles to utilize tenant colors for better branding consistency.

src/app/app.routes.server.ts

@@ -3,6 +3,6 @@ import { RenderMode, ServerRoute } from '@angular/ssr';
 export const serverRoutes: ServerRoute[] = [
   {
     path: '**',
-    renderMode: RenderMode.Prerender
+    renderMode: RenderMode.Server
   }
 ];