#51 feat: API de categorias de productos

Issue #51: discriminacion y administracion de categorias de productos.

- ProductCategoryView en /api/product_categories (list/retrieve IsNotPublico,
  mutaciones admin): filtro ?active, PATCH de description/alternative_name/active
- POST deactivate/activate con body {ids} -> {deactivated|activated, failed}
  (ignora ids inexistentes)
- POST import_from_external admin via CategoryTrytonService
- create/destroy deshabilitados (la fuente de categorias es Tryton)

tienda_ilusion/don_confiao/urls.py

@@ -8,6 +8,8 @@ from .api import (
     # Products
     ProductView,
     ProductsFromTrytonView,
+    # Product Categories
+    ProductCategoryView,
     # Customers
     CustomerView,
     CustomersFromTrytonView,
@@ -45,6 +47,11 @@ router.register(r"sales", SaleView, basename="sale")
 router.register(r"catalog_sales", CatalogSaleView, basename="catalog_sale")
 router.register(r"customers", CustomerView, basename="customer")
 router.register(r"products", ProductView, basename="product")
+router.register(
+    r"product_categories",
+    ProductCategoryView,
+    basename="product_category",
+)
 router.register(
     r"catalogue_images",
     CatalogueImageViewSet,