Add Daily sales

internal/handlers/response/order.go

@@ -111,3 +111,9 @@ type CreateOrderItemResponse struct {
 	Price    float64 `json:"price"`
 	Name     string  `json:"name"`
 }
+
+type ProductDailySales struct {
+	Day           time.Time
+	ProductID     int64
+	TotalQuantity int
+}