Add catalog sale purchase summary endpoint

- Add CatalogSaleSummarySerializer and CatalogSummarySaleLineSerializer
- Add CatalogSaleSummary API view for GET requests
- Register endpoint at /don_confiao/resumen_compra_catalogo_json/<id>
- Add comprehensive test for catalog sale summary
- Include nested customer and product details in response
- Endpoint returns id, date, customer, and lines with products

tienda_ilusion/don_confiao/urls.py

@@ -13,6 +13,7 @@ from .api import (
     SaleView,
     CatalogSaleView,
     SaleSummary,
+    CatalogSaleSummary,
     SalesForTrytonView,
     SalesToTrytonView,
     # Payments
@@ -44,6 +45,11 @@ urlpatterns = [
         SaleSummary.as_view(),
         name="purchase_json_summary",
     ),
+    path(
+        "resumen_compra_catalogo_json/<int:id>",
+        CatalogSaleSummary.as_view(),
+        name="catalog_purchase_json_summary",
+    ),
     path(
         "payment_methods/all/select_format",
         PaymentMethodView.as_view(),