Adds qr code type check in getQRCode method

[Godmartinz]

This adds a check in the Assets controller that the qrcode type selected is not none.

[what-the-diff]

PR Summary

• Enhancement in QR code generation process
  The method that creates QR codes for our application has been enhanced. Previously, it only generated a QR code if a certain setting was enabled. With this update, an additional condition has been introduced, ensuring the QR code is only created when a specific type of label is active. This increases efficiency and prevents unnecessary processes when the data type for the label does not require a QR code.