Homebrew tap for Dart SASS Emedded

[merchako]

Dart SASS Embedded is an important component of a Hugo stack, and it's a mess at the moment figuring out how to assemble it all. Might you consider writing a Homebrew tap to make the installation and configuration process easier on macOS?

Examples of confusion:

• https://discourse.gohugo.io/t/installing-dart-sass-embedded/32468/10
• Bundle Dart Sass into Hugo installation process gohugoio/hugo#8299 (comment)

[nex3]

Our intention is to make it easy to distribute the embedded Dart Sass executables along with executables for the embedded host (in this case, Hugo). But I'm not opposed to setting up a tap for this in https://github.com/sass/homebrew-sass using cli_pkg if someone wants to send a PR.