sourceforge.net/projects/libmng

[and-ri]

closed #347

[what-the-diff]

PR Summary

• Added a new file
  A new file has been added to the project.
• Changed the URL of distributable
  The download URL for the required library (libmng) has been updated to a new location on SourceForge.
• Improved handling of downloaded files
  The downloaded files will no longer be stripped incorrectly during extraction, ensuring they remain intact in the process.
• Enhanced version number matching for libpng
  The version number matching pattern for the library (libpng) has been refined to be more specific, and unnecessary strings have been efficiently removed. This ensures the accurate identification of the version number.