Fix Properties / ArgsTable in Docs views not displaying array item definition

[julrich]

This works in Controls, but not in Docs. Example:
https://github.com/kickstartDS/ds-agency/blob/main/src/components/logos/Logos.mdx#L13C13-L13C13

We should possibly be able to do something like this

<ArgTypes of={{...LogoStories, ...getArgsShared(LogoStories.parameters.jsonSchema, 'docs')}}/>

'docs' here would be a new parameter to getArgsShared, toggling a slightly different way of returning the info... suited to be displayed as a single array item definition inside Docs.

Could probably also provide those exports from existing *.stories.tsx files for conenience, and to keep the MDX files slim.