feat(api): add new clients API endpoint

The changes introduce a new API route for client-related functionality.

- **New Features**
  - Added `/clients/` endpoint routing to `src.api.clients.urls` module

src/urls.py

@@ -8,4 +8,5 @@ urlpatterns = [
     path("admin/", admin_site.urls),
     path("__reload__/", include("django_browser_reload.urls")),
     path("", include("src.api.base.urls")),
+    path("clients/", include("src.api.clients.urls")),
 ]