feat: add CatalogSale model with abstract base classes for Sale/SaleLine

- Introduced SaleAbstractModel and SaleLineAbstractModel as abstract bases
- Added CatalogSale and CatalogSaleLine models inheriting from them
- Created migration 0045 for new models
- Added CatalogSaleView, CatalogSaleSerializer with nested line creation
- Registered new models in admin
- Added catalog_sales router endpoint to URLs
- Removed placeholder api/ package (now redundant)

tienda_ilusion/don_confiao/urls.py

@@ -8,6 +8,9 @@ app_name = "don_confiao"
 
 router = DefaultRouter()
 router.register(r"sales", api_views.SaleView, basename="sale")
+router.register(
+    r"catalog_sales", api_views.CatalogSaleView, basename="catalog_sale"
+)
 router.register(r"customers", api_views.CustomerView, basename="customer")
 router.register(r"products", api_views.ProductView, basename="product")
 router.register(
@@ -23,6 +26,17 @@ urlpatterns = [
         api_views.SaleSummary.as_view(),
         name="purchase_json_summary",
     ),
+    path(
+        "payment_methods/all/select_format",
+        api_views.PaymentMethodView.as_view(),
+        name="payment_methods_to_select",
+    ),
+    path(
+        "purchases/for_reconciliation",
+        api_views.SalesForReconciliationView.as_view(),
+        name="sales_for_reconciliation",
+    ),
+    path("reconciliate_jar", api_views.ReconciliateJarView.as_view()),
     path("api/", include(router.urls)),
     path(
         "api/importar_productos_de_tryton",
@@ -39,17 +53,6 @@ urlpatterns = [
         api_views.SalesToTrytonView.as_view(),
         name="send_tryton",
     ),
-    path(
-        "payment_methods/all/select_format",
-        api_views.PaymentMethodView.as_view(),
-        name="payment_methods_to_select",
-    ),
-    path(
-        "purchases/for_reconciliation",
-        api_views.SalesForReconciliationView.as_view(),
-        name="sales_for_reconciliation",
-    ),
-    path("reconciliate_jar", api_views.ReconciliateJarView.as_view()),
     path(
         "api/admin_code/validate/<code>",
         api_views.AdminCodeValidateView.as_view(),