Feat[BE-222,223,224]: creating So create delete patch update get getall approval API

internal/entities/marketing_product.go

@@ -19,6 +19,7 @@ type MarketingProduct struct {
 	UpdatedAt          time.Time      `gorm:"autoUpdateTime"`
 	DeletedAt          gorm.DeletedAt `gorm:"index" json:"-"`
 
-	Marketing        Marketing        `gorm:"foreignKey:MarketingId;references:Id"`
-	ProductWarehouse ProductWarehouse `gorm:"foreignKey:ProductWarehouseId;references:Id"`
+	Marketing        Marketing                  `gorm:"foreignKey:MarketingId;references:Id"`
+	ProductWarehouse ProductWarehouse           `gorm:"foreignKey:ProductWarehouseId;references:Id"`
+	DeliveryProducts []MarketingDeliveryProduct `gorm:"foreignKey:MarketingProductId;references:Id"`
 }