gpui-pre-web 0.3.5

Zed's `gpui_web` crate (gpui-pre snapshot of zed@d89e9c2)
Documentation

GPUI's browser platform uses one document-owned canvas and supports one top-level window. Browser WebGPU is preferred by default, with an automatic WebGL2 fallback. Applications can force either backend with WebBackendPreference. Opening a second top-level window, or reopening one after it closes, returns WebWindowError.