[Feature request] Tabbed layout

[nyamcoder]

Coming from xmonad looking into KDE5, so far I simply <3 your neat script! Especially, since there's optional wayland support for Plasma.

And also being an avid user of the "XMonad.Layout.Tabbed" module, it would be great to have this layout style in kröhnkite, too!
Besides, it's that kind of layout is very handy on small screens, like old laptops – but also on nowadays' mobiles, cf. https://www.plasma-mobile.org/

Have an impression here:
https://wiki.haskell.org/File:Arossato-config.png
(Derived from: https://wiki.haskell.org/Xmonad/Config_archive)

That feature might IMO get quite popular, so how about it?