Add background color customization#22

Merged

teramako merged 6 commits intoteramako:mainfrom

Nutzzz:custombg

May 11, 2025

Commits on May 8, 2025

Add current Background color to Sixel support message in PrintUsage()
Nutzzz
committed

Commits on May 9, 2025

Commits on May 10, 2025