EBEAST: chromatic-sass2.js: start chroma-js v2 to scss binding
EBEAST: chromatic-sass2.js: start chroma-js v2 to scss binding

This is based on chromatic-sass, but:
* Use ES2020 instead of coffee script for the implementation.
* The chroma-js base is 2.1.0 instead of 1.4.1.
* This binding works with dart-sass instead of node-sass.

Signed-off-by: Tim Janik <6ec6ff229c4e1c5bbd5933ee92e6c5832ff023bb@gnu.org>

swesterfeld/beast,tim-janik/beast,tim-janik/beast,tim-janik/beast,swesterfeld/beast,tim-janik/beast,tim-janik/beast,tim-janik/beast,swesterfeld/beast,swesterfeld/beast,swesterfeld/beast,tim-janik/beast,swesterfeld/beast,swesterfeld/beast