* Added tools to Test Controller for evaluating gyroscope accuracy and IMU polling rates.
This adds a visual suite to the testcontroller tool to help validate IMU data from new gamepad drivers and HID implementations.
The 3D gizmo renders accumulated rotation using quaternion integration of gyroscope packets. If a controller is rotated 90° in real space, the gizmo should reflect a 90° change, allowing quick detection of incorrect sensitivity or misaligned axes.
Also includes:
- Euler angle readout (pitch, yaw, roll)
- Real-time drift calibration display with noise gating and progress
- Accelerometer vector overlay
- Live polling rate estimation to verify update frequency
Intended for developers working on controller firmware or SDL backend support to confirm correctness of IMU data processing.
