Renaming Script Contexts

- Determined how the various script contexts were used and renamed accordingly.
- ScriptContext2_Enable/Disable => Lock/UnlockPlayerFieldControls - The sole purpose of the flag is to make sure the player can't move around in the overworld. It has nothing to do with script contexts.
- ScriptContext1 => ScriptContext - It is the global script context used to set up scripts which run over many frames.
- ScriptContext2_RunNewScript => RunScriptImmediately - ScriptContext2's sole purpose was to run scripts immediately and in a separate context, usually while the global context is waiting for things like map loads or screen changes.

include/apprentice.h

@@ -16,7 +16,7 @@ struct ApprenticeTrainer
 extern const struct ApprenticeTrainer gApprentices[];
 
 void BufferApprenticeChallengeText(u8 saveApprenticeId);
-void Apprentice_EnableBothScriptContexts(void);
+void Apprentice_ScriptContext_Enable(void);
 void ResetApprenticeStruct(struct Apprentice *apprentice);
 void ResetAllApprenticeData(void);
 void CallApprenticeFunction(void);