Product module | Create Product

### Admin story:
As an admin user, I want to add new products to the website's catalog so that customers can view and purchase the latest offerings.

### DAO:
- [ ] createProduct ( )

### Service:
- [ ] productCreate ( )

### Service Test:
TestCreateProduct
- [ ] testCreateProduct
- [ ] testNullProduct

### Estimation
- 4 Hours.

### Flow chart:
```mermaid
flowchart TB
Start((Start))
EnterProductInfo((Enter Product Information))
ValidateInfo{Validate Information}
CreateProduct((Create Product))
DisplaySuccess((Display Success))
End((End))

Start --> EnterProductInfo
EnterProductInfo --> ValidateInfo
ValidateInfo --> |Valid| CreateProduct
ValidateInfo --> |Invalid| End

CreateProduct --> DisplaySuccess
DisplaySuccess --> End
```