use QuestScriptVersion to index quests

src/QuestScript.hh

@@ -3,6 +3,7 @@
 #include <stdint.h>
 
 #include <phosg/Encoding.hh>
+#include <phosg/Tools.hh>
 
 #include "Text.hh"
 #include "Version.hh"
@@ -19,6 +20,9 @@ enum class QuestScriptVersion {
   BB_V4 = 8,
 };
 
+template <>
+const char* name_for_enum<QuestScriptVersion>(QuestScriptVersion v);
+
 struct PSOQuestHeaderDC { // Same format for DC v1 and v2
   le_uint32_t code_offset;
   le_uint32_t function_table_offset;