Disallow passing functions/mixins across compilations (#4073)

Support missing channels in the embedded protocol (#3951)

This is a fast-track proposal.

Closes #3950

[skip dart-sass]
[skip sass-embedded]

Merge pull request #3930 from sass/feature.color-4

Merge feature.color-4 into main

Parse Deprecation.forVersion on compiler side (#3868)

Implement access tracking for containingUrl (#3835)

Integrate the deprecations API into the spec/docs/protocol (#3826)

Include extensions in the example docs for Node.js pkg exports (#3808)

See sass/dart-sass#2183

[Package Importer] Add types and specs (#3728)

Co-authored-by: Jonny Gerig Meyer <jonny@oddbird.net>

Add CompileRequest.silent to embedded protocol (#3773)

Co-authored-by: Natalie Weizenbaum <nweiz@google.com>

Add first class mixins to embedded sass protobuf and JS API (#3674)