feature for the lib tip

[bernardogomesrib]

1. Visual Indicators:

• Provide visual cues to guide users on where to position the barcode within the scanning area.
  it can be reference lines, corners, or other visual elements to help users align the barcode correctly.

2. Customizable Positioning and Sizing:

• By default, react-zxing scans the entire video frame for codes. However, you can add the possibility to set specific coordinates for scanning.

• Allow developers to define a rectangular region within the video frame where the scanner should focus. This way, users won’t need to spend time locating the exact spot for scanning.

• Additionally, consider allowing users to resize this scanning area on the screen. This flexibility ensures that even if a mobile phone camera isn’t focusing closely on the barcode, the user can adjust the position.