Add tuibox (#92)

tuibox is a single-header terminal UI library, capable of creating
mouse-driven, interactive applications on the command line.

README.md

@@ -115,6 +115,7 @@ List of projects that provide terminal user interfaces
 - [textual](https://github.com/willmcgugan/textual) is a TUI (Text User Interface) framework for Python inspired by modern web development.
 - [tui-go](https://github.com/marcusolsson/tui-go) A UI library for terminal applications (deprecated)
 - [tui-rs](https://github.com/fdehau/tui-rs) Terminal user interfaces and dashboards using Rust
+- [tuibox](https://github.com/Cubified/tuibox) A single-header terminal UI library, capable of creating mouse-driven, interactive applications on the command line.
 - [Terminal.Gui](https://github.com/migueldeicaza/gui.cs) Cross Platform Terminal GUI toolkit for .NET
 - [tview](https://github.com/rivo/tview/) Terminal UI library with rich, interactive widgets — written in Golang
 - [tvision](https://github.com/magiblot/tvision) A modern port of Turbo Vision 2.0, cross-platform and Unicode support.