Default value for parameter

[yodamad]

Describe the solution you'd like
Sometimes you want to override a parameter value.

Common example is when running Docker, you may want to use latest version by default but sometimes, you need to use a specific version

Additional context
Maybe a way could be to have it in the syntax : <version:1.0.0> in the command description

[welcome]

Thanks for opening your first issue here! In case you're facing a bug, please update navi to the latest version first. Maybe the bug is already solved! :)