Remove the use of an external css file

[tvbeek]

I see that we use an external css file ( https://rsms.me/inter/inter.css ) is loaded on the site.

See: https://github.com/laravelio/laravel.io/blob/main/resources/views/layouts/base.blade.php#L21

I suspect this could be self hosted.

[driesvints]

Maybe we can @import it in the main css file? 🤔