Fully decouple hecl from Metaforce

- Added CStringExtras Convert functions
  (and UTF-compatible versions)
- GX header copied into Runtime
- SFX headers copied into Runtime/Audio

Runtime/MP1/World/CMetroidPrimeEssence.cpp

@@ -14,7 +14,7 @@
 #include "Runtime/World/CScriptWaypoint.hpp"
 #include "Runtime/World/CWorld.hpp"
 
-#include "DataSpec/DNAMP1/SFX/MetroidPrime.h"
+#include "Audio/SFX/MetroidPrime.h"
 
 #include "TCastTo.hpp" // Generated file, do not modify include path
 
@@ -721,4 +721,4 @@ void CMetroidPrimeEssence::SetupCollisionActorManager(CStateManager& mgr) {
   AddMaterial(EMaterialTypes::ProjectilePassthrough, mgr);
 }
 
-} // namespace metaforce::MP1
+} // namespace metaforce::MP1