include what you use in betterRenderer

Its sources reached the standard library through the project headers they
included; those are imports now. 178 headers across 56 files, plus 18 C
library headers elsewhere for memcpy/printf and friends. MSVC's STL does
not supply these transitively the way libstdc++ does.

betterRenderer/renderer/source/nvrenderer_d3d12.h

@@ -11,6 +11,8 @@
 #include <dxgi1_6.h>
 #include <dxgidebug.h>
 #include <nvrhi/d3d12.h>
+#include <string>
+#include <vector>
 
 class NvRendererBackend_D3D12 : public NvRendererBackend {
   friend class NvRenderer;