feat: playground and props components

[atinux]

https://www.docz.site/docs/built-in-components

Adding a Props component will allow to create controls.

This would help us to quickly document components without the need of Storybook.

[atinux]

Being able to have this syntax for documenting components would be nice (JSDoc like)

https://vue-styleguidist.github.io/docs/Documenting.html#available-tags

[atinux]

We could use this: https://vue-styleguidist.github.io/docs/Docgen.html#api

[atinux]

@farnabaz could you checkout https://next.windicss.org/guide/features/variant-auto-infer.html and https://next.windicss.org/utilities/borders.html

Anthony Fu did a playground component too: https://github.com/windicss/docs/tree/next/.vitepress/theme/components/playground