Support only QR Code scan mode (for fast scan)

[programming-with-ia]

I would like to request a feature to enable a "QR Code scan mode" where the scanner focuses exclusively on detecting QR codes. This would improve scanning performance and reduce delays caused by attempting to recognize other types of barcodes.

Use Case: This feature would be beneficial for applications that solely rely on QR codes for their operations, such as ticket validation, payment systems, or authentication flows. Limiting the scanner to QR code detection would speed up the scanning process and enhance the user experience.