Add a classic & dark original Sony Xperia theme for LeanType

[Yoannjap]

Hello,

And first of all, thanks a lot for your brilliant keyboard that is my daily driver one for 2 months now. It is absolutely great.

I would so like a skin that mimic Xperia keyboards (https://teclado-xperia.fr.uptodown.com/android) both classic mode and dark mode.

Would it be possible?