[WIP] Incremental mission save 2

This commit (and the previous one) exist to document the first approach I
took to storing mission data. It's only here for posterity. This comment
was added while rebasing.

src/structs/0104.hpp

@@ -2,6 +2,7 @@
 
 #define AEQUIP_COUNT 9
 #define AINVEN_COUNT 50
+#define AQINVEN_COUNT 50
 
 #pragma pack(push)
 

src/structs/0728.hpp

@@ -2,6 +2,7 @@
 
 #define AEQUIP_COUNT 12
 #define AINVEN_COUNT 50
+#define AQINVEN_COUNT 50
 
 #pragma pack(push)