Deal with the consequences of https://sass-lang.com/d/import

[pradyunsg]

What's happening?

Sass has deprecated @import, something that Furo relies on fairly heavily. The automated migration tool does not work for how Furo's code is layed out / built, so... I'll likely need to change how the styles are built.

Reproducer

1. Build with stb compile
2. Notice the deprecation warnings.

Expectation

No deprecation warnings.

This was requested by a maintainer.

• I was asked to open an issue in a discussion by a maintainer.

Code of Conduct

• I agree to follow the Code of Conduct.