feat: add G Hub LED SDK approach (Phase 0)

G Hub kernel drivers (logi_joy_xlcore.sys) intercept all HID
commands, making direct HID access impossible for LEDs.
New approach: load G Hub's sdk_legacy_led DLL and use the
LogiLed API to control LEDs through G Hub's own channel.
Probes exported functions, tries SetLighting and zone-based
lighting. Falls back to HID++ and legacy if SDK fails.

Author: privaloops