Add Focal layout

[Roang-zero1]

Adds the Focal keyboard from: Keyhabit/Focal-keyboard-layout#2 (comment)

[semanticdiff-com]

Review changes with  

Changed Files

File	Status
packages/keybr-generators/layouts/en_focal.json	0% smaller
packages/keybr-generators/lib/generate-layouts.ts	0% smaller
packages/keybr-keyboard/lib/layout.ts	0% smaller
packages/keybr-keyboard/lib/layout/en_focal.ts	0% smaller
packages/keybr-keyboard/lib/load.ts	0% smaller

[Roang-zero1]

There are some open points still to address, these are documented here: Keyhabit/Focal-keyboard-layout#2 (comment)

[Roang-zero1]

Done, this is ready.

[aradzie]

Thanks!