First windows-x64 binary in tinqs/builds. Branded (Tinqs icon/splash/logos baked in);
version 4.6.3.stable.mono.custom_build.67d0322c0. Closes the engine-write-access TODO
(was: only macos-arm64 published).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>