I just now upgraded to F39 and i notice that vscodium says it's _going to_ provide suggestions from Github's(Microsoft's) Copilot! So, i started looking again for a nim GUI editor i can live with, and i came across Elementary OS' Code[1]. Copying the two linked files above to /usr/share/gtksourceview-4/styles/ and /usr/share/gtksourceview-4/language-specs/ and restarting Code enabled Nim syntax highlighting. I don't know if everything is perfect yet, but it's way snappier than vscodium and using way less ram.
Just wanted to necro bump this with a big thanks to @Stefan_Salewski and @spip for the files and info and add my preliminary recommendation for Code for people wanting to get off of VSCode/ium who still want a GUI. 1. <https://github.com/elementary/code>
