I wonder if anyone has already made a syntax file for Mcedit?
Assuming you’re talking about the GNU utility, not to my knowledge. Most people use an editor with language server capability, utilizing LanguageServer.jl.
I need something that can be run in a terminal whose name is not vim or emacs and is super easy, and mcedit and nano are super easy.
You may be interested in the langserver.org website, which has a list of editors (LSP clients) that should work with the Julia language server.
By the way, the information on the Julia language server seems to be outdated.