Support for zsh parameter and subcommand description with autocompletion

[jakobkmar]

Zsh has support for showing the description of parameters and subcommands.

Example:

Can Clikt generate a completion script which shows these helpful descriptions?

[ajalt]

The ZSH completion is implemented using bashcompinit, which doesn't support descriptions AFAIK.

I'd welcome a PR if you want to write a new completion generator that uses the ZSH-native completion APIs. You could look at the FishCompletionGenerator for an example of a generator that includes help descriptions.