add orders app and add new model on products

core/apps/orders/apps.py

@@ -0,0 +1,10 @@
+from django.apps import AppConfig
+
+
+class OrdersConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'core.apps.orders'
+
+    def ready(self):
+        from . import admin 
+