[WIP] feat: simple hex data colorization

[CreeperLin]

Colorize hex data by treating each byte as an 8-bit color (3, 3, 2 bits for R, G and B). I find it useful visualizing binary data with unknown format.

Also an implementation on #279, although using RGB instead of HSL, and the alpha is currently fixed at 0.5.

If this feature is desirable, options to toggle it and change the alpha value and even palettes can be added in the future.

[spaghetti-toast]

I would prefer a toggle option for something like this as I find it harder to read the data in some areas.