Direct dependency `node-sass` is incompatible with recent versions of Python

[domlander]

A direct dependency node-sass was recently updated to its latest version, which is incompatible with Python from version 3.12.x. This means that developers will encounter errors when running yarn and installing node-sass if their machine is also running the latest version of Python.

We should replace the deprecated node-sass project, with a project that is actively maintained, such as Dart Sass