Add the new colors.toml omarchy convention?

[Straigh-Classy]

Hello! I love this theme, would you please consider updating to the new colors.toml convention that came out in Vesion 3.x.x of omarchy?

Oldjobobo made an easy tool for theme makers to update it!
https://github.com/OldJobobo/make-colors

[neonvoidx]

@codyjgeorge