* Refactor Kyria into separate left/right "revisions"
  of the Kyria shield, and include central
  kyria.dtsi file with common definition.
* Fixes for keymaps to work fully with matrix
  transforms that override effective rows/columns.
* Add ability for matrix transform to do row/col
  offsets, which is needed for split keyboards.

Refactor keymap to behaviors

* Basic Clueboard Californai Macropad shield definition.
* New "direct" KSCAN driver that supports non-matrix direct
  wiring for switches, needed for macropad that doesn't have
  a matrix at all.
* Some renames for existing KSCAN GPIO driver to make the implied
  "matrix" part explicit.

* Use extra comptible = "zmk,behavior-global" to add
   behaviors to global bindings for event notification.
* Implement mod-tap, as a keymap binding and global one
  to skip tap if other keycode pressed while held.

* Do mapping to positions right in kscan handler, and then
  surface positions throughout the API.

* Allows "gaps" for keyboards like Kyra.
* Allows keyboards with matrixes that don't map the logical key
  locations to have normal looking keymaps when defined.