utf8ansi terminal renderer

[subtleGradient]

utf8+ansi renderer instead of rendering to PNG, it renders to UTF-8 chars + ANSI that doesn't break when someone changes their terminal theme

good for converting BBS art into Linux / macOS terminal art

[subtleGradient]

PLENTY of cleanup work left to go before this is ready to land (if ever); should probably be a separate project entirely that depends on libansilove instead; but here's what we've got if y'all want to check it out :D