Here is an unwanted advice from a old dog, you don't need any libray to write CLIs.

A function to display help, and another old to parse the CLI parameters isn't PhD level coding.

Also nowadays, any LLM friend can quickly generate them.

Yeah the last CLI app I used was actually a TUI. It routed std out and std err from scripts and programs it'd call out to into separate windows. It had animations and effects and a help system built in. It also had theming support because the library I used for the TUI happened to have that and came with some default themes! It was a bit beyond a simple CLI tool.

If I'm farfing around with the console I'm going to have fun.