bcat's Corne layout
This split ergo layout mirrors
my Lily58 layout
with the number row removed and RGB controls added. See that layout's docs for
more details on the principles that went into the layout.
Default layer
![Default layer layout](https://i.imgur.com/s1LDlSQ.png)
(KLE)
Lower layer
![Lower layer layout](https://i.imgur.com/v4DjXM6.png)
(KLE)
Raise layer
![Raise layer layout](https://i.imgur.com/Wr6Ptyy.png)
(KLE)
Adjust layer
![Adjust layer layout](https://i.imgur.com/9OtGLCT.png)
(KLE)