* 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
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* Migrate `LAYOUTS` to data driven, Z
* add LAYOUT_numpad_6x4
* tidy-up info.json data
* use GitHub account name for maintainer field
* remove meta key
* add matrix diagram to delphine.h
* update Community Layout support