This is a draft PR which adds any missing chroma classes. Unfortunately, it seems it's not as simple as specifying the color for .nx since it breaks highlighting in other places like variable declarations.
Open for suggestions and we will probably need to report any issues upstream.
PS. if we find a solution, I'll sort the selectors to make things easier in the future to see the diff.
Refs #32104 (closed).
/CC @coliff for any suggestions