I use gitk pretty often and really like the fact that it acts like a modal, showing a richer UI visualization based on a shell command I run, and when I close it, I'm back to the command line where I was. I've been hoping to write my own CLI tools like that, ideally using React for the UI, but it seems like it's a big pain to set up right now. Is anyone aware of a nice way to do that? Maybe Zenity is flexible enough for arbitrary UIs, not just dialog boxes?