* Migrate `LAYOUTS` to data driven, 0-9
* Migrate `LAYOUTS` to data driven, A
* Migrate `LAYOUTS` to data driven, B
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* Migrate `LAYOUTS` to data driven, H
* Migrate `LAYOUTS` to data driven, handwired
* Migrate `LAYOUTS` to data driven, I
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* Migrate `LAYOUTS` to data driven, X
* Migrate `LAYOUTS` to data driven, Y
* Migrate `LAYOUTS` to data driven, Z
* Update keyboard kit URL
* Replace custom RGB driver with new one from #7183
* Replace backlight with standard impl
* Remove some unnecessary default settings
* Disable COMMAND since docs want it off by default
(There's no working IS_COMMAND set for this board anyway, so it's
already a nop.)
