Add tab autocompletion

[stacksjb]

This would be external to rust code, would be a bash or zsh file (I will investigate)

https://blog.deepjyoti30.dev/tab-autocomplet-cli-apps

Not sure if this can be bundled with the rust/cargo or installed separately.

[stacksjb]

@alanvardy do you maintain the cli structure in a document anywhere?

[stacksjb]

It looks like we use Clap, so clap_generate might just do it for us - https://kbknapp.dev/shell-completions/

[alanvardy]

I really like the look of shell-completions :+1: