feat: order creation on cart detail view

shop/models.py

@@ -356,7 +356,8 @@ class Order(TimestampedModel):
         default=Decimal("0"), max_digits=13, decimal_places=2, verbose_name=_("total")
     )
 
-    user = models.ForeignKey(User, on_delete=models.PROTECT, verbose_name=_("cliente"))
+    user = models.ForeignKey(User, blank=True, null=True, on_delete=models.PROTECT, verbose_name=_("cliente"))
+    email = models.EmailField(blank=True, verbose_name=_('e-mail'))
 
     # Datos de facturación
     billing_address = models.CharField(
@@ -492,11 +493,12 @@ class CustomerAddress(models.Model):
         default=Types.SHIPPING,
         verbose_name=_("tipo de dirección"),
     )
+    email = models.EmailField(blank=False, null=False, verbose_name=_("e-mail"))
     default = models.BooleanField(default=True, verbose_name=_("por defecto"))
     hidden = models.BooleanField(default=False, db_index=True, verbose_name=_("oculto"))
 
     def __str__(self):
-        return f'{self.full_name} - {self.address}, {self.address_zip}, {self.address_state} - {self.address_country}'
+        return f"{self.full_name} - {self.address}, {self.address_zip}, {self.address_state} - {self.address_country}"
 
     class Meta:
         verbose_name = _("dirección de cliente")