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/motioncache.h

@@ -2,11 +2,11 @@
 
 #include <cstdint>
 #include <functional>
-import eu07.glm;
-#include <cassert>
 #include <cstddef>
 #include <unordered_map>
+#include <cassert>
 
+import eu07.glm;
 struct MotionCacheId {
   union {
     struct {