WebVR Polyfill

The `webvr-polyfill` library provides a comprehensive JavaScript implementation of the WebVR 1.1 specification, designed to ensure WebVR content functions consistently across a wide array of platforms, regardless of native browser or device WebVR support. Its primary function is to inject a WebVR 1.1 API if absent, patch browsers with incomplete or inconsistent implementations, and offer a synthesized `CardboardVRDisplay` on mobile when native support is missing. The current stable version is 0.10.12, with a release cadence that has slowed as the ecosystem transitions towards the WebXR Device API. A key differentiator is its ability to provide a baseline VR experience by abstracting away fragmented native support, including head tracking orientation prediction to minimize motion-to-photon latency and reduce VR sickness. The project aims to allow developers to target the WebVR API without extensive browser-specific workarounds.