Create minimal TUI example for bare library without Bevy

[janhohenheim]

Could use ratatui

[17cupsofcoffee]

I've been playing around with writing a TUI example using ratatui (the actively maintained fork of tui-rs):

The code is a bit of a mess at the moment, but hopefully I'll get chance to clean it up and send a PR at the weekend (if this isn't something you're already working on yourself!)

[janhohenheim]

Woah, I love ratatui! I was not working on this yet, but if I had, I would also have picked ratatui :) The UI looks pretty clear so far! I'd love to include it in the repo once you are done!