Feature request: Export QMK-like json #158

QMK has a physical layout descriptor in keyboard.json/info.json that is used for the QMK configurator: https://docs.qmk.fm/reference_info_json#layouts. This format is used by a few other tools, like the ZMK keymap-editor (and its helper), keymap-drawer and the converter for ZMK physical layouts.

If ergogen could export its keys definition in this format, it would be helpful to users for both defining QMK keyboards, ZMK physical layouts for ZMK Studio support, and use keymap-editor and keymap-drawer.

Note that the QMK spec isn't fully specified in terms of rotated keys, but both keymap-editor and keymap-drawer fully specifies it in a common way. This is described in the links above, but essentially:

• r: rotation in degrees, positive for clockwise
• rx, ry: rotation center for r (after translating top left corner to x, y)