Add city42 keyboard

[controller-works]

Description

Adds support for city42 keyboard from Controller Works. It is a unibody split keyboard based on the RP2040 with a Cirque Trackpad.

QMK Pull Request

Link to QMK Pull Request

Checklist

• The VIA support for this keyboard is MERGED in QMK master already (MANDATORY)
• The VIA definition follows the guide here: https://caniusevia.com/docs/layouts
• I have a V3 JSON version for this keyboard definition.(MANDATORY)
• I have tested this keyboard definition using VIA's "Design" tab.
• I have tested this keyboard definition with firmware on a device.
• I have assigned alpha keys and modifier keys with the correct colors.
• The Vendor ID is not 0xFEED

[Xelus22]

Please remove src/ folder definiton, which is the old V2 definitions which are legacy.
Your QMK Firmware was only merged 3 weeks ago.