feat(website_sale_aplicoop): ordenar productos por website_sequence y nombre

- Ordena productos primero por website_sequence y luego alfabéticamente por nombre (case-insensitive)
- Fix test: cambiar tipo de producto de 'product' a 'consu' (Odoo 18 compatibility)

website_sale_aplicoop/models/group_order.py

@@ -477,7 +477,10 @@ class GroupOrder(models.Model):
                     len(products),
                 )
 
-        return products
+        # Sort products by website_sequence (primary) and name (secondary, case-insensitive)
+        return products.sorted(
+            lambda p: (p.product_tmpl_id.website_sequence, (p.name or "").lower())
+        )
 
     def _get_products_paginated(self, order_id, page=1, per_page=20):
         """Get paginated products for a group order.