* Migrate `LAYOUTS` to data driven, 0-9
* Migrate `LAYOUTS` to data driven, A
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* Migrate `LAYOUTS` to data driven, handwired
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* Migrate `LAYOUTS` to data driven, Z
* [Keyboard] Modernize the KMAC implementation
This brings the matrix implementation more in line with the current
default matrix code.
It also simplifies the implementation quite a bit.
* [Keyboard] Add layout support to KMAC
