put every include before every import

A header first pulled in through an imported module's global module
fragment leaves no include guard in the importing unit - macros do not
cross a module boundary - so a later textual include parses it again and
MSVC rejects the redefinition. Redoes the betterRenderer sweep with
placement that stays out of #if blocks, which is where the previous one
dropped <fstream> and broke nvrenderer_d3d12.cpp.

betterRenderer/renderer/source/nvrenderer_d3d12.h

@@ -4,6 +4,8 @@
 
 #include "nvrenderer/nvrenderer.h"
 #include "nvrendererbackend.h"
+#include <string>
+#include <vector>
 
 #if LIBMANUL_WITH_D3D12
 
@@ -11,8 +13,6 @@
 #include <dxgi1_6.h>
 #include <dxgidebug.h>
 #include <nvrhi/d3d12.h>
-#include <string>
-#include <vector>
 
 class NvRendererBackend_D3D12 : public NvRendererBackend {
   friend class NvRenderer;