Generate an extra for LS_COLORS

[azdanov]

Is your feature related to a problem?

I'm trying to create a custom theme for the https://github.com/sharkdp/vivid/ project.

At the moment I've used an LLM to create one, but I'm not sure how to ensure it's done correctly.

(yml files, but in txt to be able to upload)
astrolight.txt
astrodark.txt

Describe the new feature

It would be cool if that could be somehow auto-generated. Or if someone could help me create a PR to their project with correct theme colors.
At the moment I've based it on tokyonight, but I've never done any theme development in my life, so not even sure how to proceed.

Additional context

LS_COLORS is an environment variable that controls the colorized output of ls, tree, fd, bfs, dust and many other tools.

[mehalter]

If anyone decides to pick this up simply make sure to check out the Contribution Guidelines in the README: https://github.com/AstroNvim/astrotheme?tab=readme-ov-file#-contributing