There needs to pe a standard that all editors understand. Propriatory answers like emacs don't count as some of us do not have the same editor religion.
Personally, I use markdown for comment content, not that IDEs do much with it, at least Markdown supports images with the `` syntax.
I think I've seen some tree-sitter grammars actually define injections such that their comment are rendered with markdown (but now I can't figure out where I saw that, maybe one of the Zed specific ones).
I think I've seen some tree-sitter grammars actually define injections such that their comment are rendered with markdown (but now I can't figure out where I saw that, maybe one of the Zed specific ones).