* ZMK_SLEEP also enables PM_DEVICE, so be sure to mark kscan nodes as wakeup sources so they can wake keyboards from sleep.
* Align codebase with documentation.
Removed "label" properties which no longer have any function. Labels are still used as layer names and as identifiers for sending behaviors between sides of a split keyboard, so those have been left alone for now.
See https://kbd.dailycraft.jp/bat43/ for details.
