Add ShopModel and integrate with ProductModel

- Created ShopModel with fields for shop name, description, and user association.
- Updated ProductModel to include a foreign key relationship with ShopModel.
- Added admin interface for ShopModel with search functionality.
- Created migrations for ShopModel and its integration with ProductModel.

backend/account/models.py

@@ -120,6 +120,20 @@ class User(AbstractBaseUser, PermissionsMixin):
             return self.phone
 
 
+
+class ShopModel(models.Model):
+    user = models.OneToOneField(User, on_delete=models.CASCADE, related_name='shop', verbose_name='کاربر')
+    shop_name = models.CharField(max_length=100, verbose_name='نام فروشگاه')
+    shop_description = models.TextField(verbose_name='توضیحات فروشگاه')
+
+    def __str__(self):
+        return f"{self.user.phone} - {self.shop_name}"
+    
+    class Meta:
+        verbose_name = 'فروشگاه'
+        verbose_name_plural = 'فروشگاه ها'
+
+
 class UserAddressModel(models.Model):
     user = models.ForeignKey(User, on_delete=models.CASCADE, related_name='address', verbose_name='کاربر')
     name = models.CharField(max_length=30, verbose_name='نام ادرس')