Storybook control docs generation based on theme

[ebellumat]

Is your feature request related to a problem? Please describe.

I Wish that the docs generated by storybook using styled-system was more concise and smarter or no descriptions.

Other problem is: The options configured in themes appears in the docs, this is amazing, but when we transform that in controls, all inputs are "JSON string".

Bg with styled-system:

Controls with pure component:

When activating controls, the ideal here is to be a select input:

Describe the solution you'd like

My component vs Component using styled-system

Pure component

Styled system

Describe alternatives you've considered
Create all the args to controls manually, but this hurts.

Additional context
This is the only feature that i need to transform my workflow perfectly. Styled-system is amazing, but the integration with storybook falls.