The open source OpenXR runtime

doc: Document !2065

+3
+3
doc/changes/misc_fixes/mr.2065.md
··· 1 + vcpkg: Remove SDL "base" feature. It has been removed upstream, see 2 + [MR](https://github.com/microsoft/vcpkg/commit/ea9f45d1bc03efbf43a3bbd0788d6a433b8fe445). 3 + Monado builds on Windows and the debug gui works (`XRT_DEBUG_GUI=1`).