Feature Request: Access to Unfiltered Eye Tracking Data in OpenXR

Hi, I'm developing with VIVE Focus Vision using OpenXR. Currently, there is no way to disable or control gaze filtering (e.g., smoothing or jitter suppression). This is a critical issue for researchers or developers who need raw eye tracking data.

In the SRanipal SDK, this was possible via `SetEyeParameter` and `sensitive_factor`. We hope a similar feature can be exposed in OpenXR API or provided via extensions. Thank you!

Start by reviewing the OpenXR API and extension specifications for eye-tracking capabilities, then compare the requested behavior with SRanipal's SetEyeParameter and sensitive_factor references. Done would require a decided specification or extension design for controlling gaze filtering or exposing unfiltered eye-tracking data.

Written by the indexing model from the issue text.