[Feature Request] Update K4 Pro ANSI RGB to latest source code

[epokuser]

Feature Request Type

• Core functionality
• Add-on hardware support (eg. audio, RGB, OLED screen, etc.)
• Alteration (enhancement/optimization) of existing feature(s)
• New behavior

Description

https://www.keychron.com/pages/firmware-and-json-files-of-the-keychron-qmk-k-pro-and-k-max-series-keyboards
the does not allow for the latest firmware file download, and source code is not updated to match new firmware
https://github.com/Keychron/qmk_firmware/tree/bluetooth_playground/keyboards/keychron/k4_pro

[PeterMortensen]

Branch "bluetooth_playground" is stale. It would probably be in "2025q3". The only representative there for the K Pro series is currently K8 Pro.

Somewhat related (for instance, it includes statements about branch "bluetooth_playground"):

• The current software state