This is just my opinion, but if the maintainers are unresponsive, or even if your opinion just diverges from the maintainers', then its perfectly reasonable to fork the project (with a name change) to continue development. That's what open source is for!
Most discussion happens either here or in the Discord (also accessible via Matrix or IRC bridges). But overall Nim is a small community. If you do fork INim, please do advertise here, on discord and in the "this month" blog posts. I also use Inim as-is currently but I'd be happy to see new features (colors? better completion?)
