Add Moza FFB + ViGEm virtual gamepad integration

[Copilot]

Implements the full FFB plan from plan.md: Moza wheel → force feedback from live telemetry, wheel input → ViGEm virtual Xbox 360 controller.

Architecture

FixedUpdate → TelemetryStateStore
           → WheelIntegrationRuntime.Update()
               ├── MozaWheelInputProvider.Poll()   → VirtualPadState → VigemXboxGamepadOutput
               └── FfbModel.Compute(telemetry)     → FfbCommand     → MozaWheelFfbProvider

New components

• Config/WheelConfig.cs — BepInEx ConfigEntry<T> bindings for Wheel/General, Wheel/FFB, Wheel/Input; all live-tunable at runtime
• Contracts/ — IWheelInputProvider, IWheelFfbProvider, IVirtualGamepadOutput; backend-agnostic for future DirectInput support
• Moza/MozaSdkAdapter.cs — Single boundary around all MOZA SDK calls; uses dynamic for effect objects (HIDData is a reference type); wraps installMozaSDK/removeMozaSDK, getHIDData, createWheelbaseETDamper, createWheelbaseETConstantForce, stopForceFeedback
• Moza/MozaWheelInputProvider.cs — Polls getHIDData each frame; normalises fSteeringWheelAngle to −1..1 with configurable deadzone/saturation; maps int16 pedal axes to 0..1
• Moza/MozaWheelFfbProvider.cs — Manages two persistent DirectInput effects: ETDamper (continuous cForce resistance) + ETConstantForce (tire impulse bursts)
• Ffb/FfbModel.cs — Computes FfbCommand per frame: cForce → damper coefficient with exponential smoothing; TireFR − TireFL → threshold-gated, cooldown-limited impulse magnitude
• Output/VigemXboxGamepadOutput.cs — ViGEm Bus virtual Xbox 360 controller; steer → left stick X (full short range), throttle/brake → triggers
• Runtime/WheelIntegrationRuntime.cs — Orchestrator: x64 guard, graceful degradation on partial init failures (FFB-without-pad and pad-without-FFB both handled), clean teardown

Plugin wiring (NewStarTelemetryPlugin.cs)

// Awake
_wheelConfig = new WheelConfig(Config);
if (_wheelConfig.Enabled.Value)
{
    _wheelRuntime = new WheelIntegrationRuntime(Logger);
    _wheelRuntime.Initialize(_wheelConfig);
}

// FixedUpdate (after existing telemetry)
_wheelRuntime?.Update(in data);

// OnDestroy
_wheelRuntime?.Dispose();

Dependencies added

• Nefarius.VigemClient 1.22.40 (NuGet)
• libs/moza/x64/MOZA_API_CSharp.dll (local reference, <Private>true</Private>)

Runtime requirements

Native DLLs MOZA_API_C.dll + MOZA_SDK.dll must be copied from libs/moza/x64/ into the game root directory. ViGEm Bus driver must be installed. MOZA Pithouz must be running.