[veler]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• New feature or enhancement
• UI change (please include screenshot!)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Internationalization and localization
• Other (please describe):

What is the current behavior?

Issue Number: #270

What is the new behavior?

1. Added a QR Code Generator / Reader tool. User can generate a QR Code as the user change the "Text" field. User can also read a QR Code appearing on an image.
2. Modified IUIImageViewer to support custom handling of "Save As" for a given file extension. This is needed in order to save the QR Code as "SVG". The reason for it is that only XZing (library used for generating the QR Code) can know how a SVG can be generated from the input text.

Other information

Quality check

Before creating this PR:

• Did you follow the code style guideline as described in CONTRIBUTING.md
• Did you build the app and test your changes?
• Did you check for accessibility? On Windows, you can use Accessibility Insights for this.
• Did you verify that the change work in Release build configuration
• Did you verify that all unit tests pass
• If necessary and if possible, did you verify your changes on:
  • Windows
  • macOS (DevToys 2.0)
  • Linux (DevToys 2.0)