Switch to the popular, maintained devicons/devicons repo from unmaintained vorillaz/devicons

[Snailedlt]

At the moment svelte-icons seems to be based off of vorillaz/devicons. As it is what is linked here on GitHub inside this folder: https://github.com/Introvertuous/svelte-icons/tree/master/icons. This repository is heavily outdated and unmaintained. The last commit was in 2017 and the last official release in 2015.

Since then a lot of new projects came to life and new popular icons got added, that are not supported on there now. However there a fork (devicons/devicon) of that repository, that actually still has regular updates. It also has about three times more GitHub stars in case that is any indicator of popularity.

I actively maintain devicons/devicon, so if you haver any questions about adding it into svelte-icons, please do let me know :)

Disclaimer: I copied issue title and most of the description from this issue on the ryanoasis/nerd-fonts github repo