graphics/nomacs: Update to 3.14.2, take MAINTAINER

ChangeLog: https://github.com/nomacs/nomacs/releases

• Themes added (light and dark)
  • RAW loader improvements
  • Anti-aliasing improved
  • Printing improved
  • Batch cropping added
  • Support for more file formats
  • Start-up time reduced
  • And various bug fixes

Submitter requests maintainership

PR: 245079
Submitted by: vidar@karlsen.tech