Webfont CDN

I use a Chromebook as my main development driver. As a result, the only way I could install fonts is by using an extension to import a webfont.

Other fonts [such as Firacode are hosted on CDNs](https://github.com/tonsky/FiraCode#browser-support).

Sadly using GitHub directly gives a CORS error:

```
@font-face {
font-family: 'Monaspace Neon';
src: url(https://github.com/githubnext/monaspace/raw/main/fonts/webfonts/MonaspaceNeon-Regular.woff) format(woff2);
}
```

It would be great to see Monaspace on popular CDNs.