For lmt/markdown: I believe yes, to the extend the editor allows for it. It is seemingly just like regular mardkown code blocks. I get the correct syntax high-light in the ``` code blocks. I don't have lint/LSP setup yet (currently moving to Neovim), so I can't say anything about that.

Literate/.lit: I don't know, I guess not.

Emacs/orgmode: Yes, this also does syntax highlight. And you can edit the code-block in a separate window as if it was a "real" source code file. I've been using this for almost two years now. Personal opinion: I don't think the benefits of Emacs outweight the cons.