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/tests/test_api.py

@@ -34,6 +34,16 @@ class TestAPI(APITestCase, LoginMixin):
         self.assertEqual(sale.id, content["id"])
         self.assertIsNone(sale.external_id)
 
+    def test_create_catalog_sale(self):
+        response = self._create_catalog_sale()
+        content = json.loads(response.content.decode("utf-8"))
+        self.assertEqual(response.status_code, status.HTTP_201_CREATED)
+        # self.assertEqual(Sale.objects.count(), 1)
+        # sale = Sale.objects.all()[0]
+        # self.assertEqual(sale.customer.name, self.customer.name)
+        # self.assertEqual(sale.id, content["id"])
+        # self.assertTrue(sale.catalog_sale)
+
     def test_create_sale_with_decimal(self):
         response = self._create_sale_with_decimal()
         content = json.loads(response.content.decode("utf-8"))