Tabs: Plain/Simple Variant

[codytooker]

I know Flux is meant to be a good opinionated styling for most things however I think components like Tabs should have a plain or simple variant that only has the minimal styles to make the panels hidden or visible.

As an example of why this would be useful. In tailwind UI ecommerce there is a section for switching between product images. In the javascript code for these it uses headless UI's Tab component. I am recreating this with the Flux tabs by simply making a new variant called plain that only has these classes on panel 'hidden data-[selected]:block'