Add baker flag preset

[harveyongh]

Description

Pull request adds an 8-color layout based on the 1978 rainbow flag design by Gilbert Baker.

Relevant Links

Colors were picked from this page, which also includes an explanation of the color meanings for his design. https://gilbertbaker.com/rainbow-flag-color-meanings/

Screenshots

Screenshot showing baker configuration option included:

Additional context

Hues for the 6 standard rainbow colors are slightly different, and 2 new colors are added. I added this preset for my own use, and I think other people might like to use it.

[hykilpikonna]

Nice addition! I wonder why sex and magic were removed tho, they seem important 💭