Hi! I noticed that Intellij only had an empty and an unsupported plugin for Nim. Time for a brand new one! So I've thrown together a new Intellij Nim plugin. Most work was done by Claude, really.
It's over here: https://plugins.jetbrains.com/plugin/31790-nim-using-nimlangserver
If you have issues or ideas, please put them on the issue tracker.
It's only tested on linux, so let me know if it works on windows and mac!