[Feature] Ability to set random for colour codes #791

@tripplehelix Sorry for the late response, but I'm not sure this is a good idea.

• First, this raises a few questions implementation-wise. Should we make this list configurable? Should the list contain all 16 default colors (like pre-v1.1.0)? If not, which colors does it contain? Also, a color is a 32-bit integer, but "random" is a string. There's no trivial way to specify this as one single type in Zig (I could work around it, but it'd be pretty ugly, though I guess that's an implementation detail).
• Now, let's say we make it configurable. This would be non-trivial to do in the current configuration format, because the INI file format doesn't specify how to make lists, and as such nothing like that is implemented in the parser Ly uses. We could create a separate file with all colors perhaps, or even change format completely, but that sounds like a lot just for one list.
• Finally, while I'm all in for customization, I'm not sure this would even look good in the majority of cases. Sure, you could use it for, say, the foreground color (which applies to all text for example), or the game of life animation, but in other cases like the color mix & DOOM animations, it could end up looking quite weird. Though, to be fair, I'm no one to judge other people's tastes 😄

1. Sounds like you'd have to have a list of colours and randomly pick from this list, which could then be customisable in the settings.
2. Could we just associate each colour in the ini file to a number, then have the numbers 1-16 picked from randomly in the code? I don't think creating a new file for just colours would be a good idea at all.
3. Yes, which is why the user would need to specify which elements were randomised, maybe just background colours, maybe just the border box. Probably need to limit it, if we did limit it I'd say limit to just background effects and colours. Which is where my original idea stemmed from. I don't think weird is a bad thing, you should see some of my horrendous colours schemes.

So to summarise; list of colours in the config which are configurable, are linked to numbers, which I'm sure zig can randomise. Only applied to background animations and background colour?

# Do you want the background colours to be random?
random = true

# Randomised background colours
1 = 00ffffff
2 = 00000000
3 = 00ff00ff
...

Honestly, I think implementing this feature with the current configuration file format is not a good idea. But with something like a shell script, this'd be much easier to implement (technically speaking, Ly wouldn't have to implement the feature then, since the randomisation could be done inside the shell script itself).