Add native analog input support for magnetic / Hall-effect keyboards

Forza Horizon 5 treats all keyboards as digital (0%/100% input). However, modern magnetic keyboards (Wooting, Steelseries Apex Pro, Razer Huntsman V2 Analog) can detect partial key pressure, acting like analog triggers. The game ignores their DirectInput axes.

Suggestion:
Add native DirectInput axis binding for throttle, brake, and steering when an analog keyboard is detected. This would allow proportional control (e.g. 30% throttle) without using third-party controller emulators.