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.

src/hof_pc.c

@@ -14,7 +14,7 @@ static void Task_WaitForPaletteFade(u8);
 void AccessHallOfFamePC(void)
 {
     SetMainCallback2(CB2_DoHallOfFamePC);
-    ScriptContext2_Enable();
+    LockPlayerFieldControls();
 }
 
 void ReturnFromHallOfFamePC(void)
@@ -25,7 +25,7 @@ void ReturnFromHallOfFamePC(void)
 
 static void ReshowPCMenuAfterHallOfFamePC(void)
 {
-    ScriptContext2_Enable();
+    LockPlayerFieldControls();
     Overworld_PlaySpecialMapMusic();
     ScriptMenu_CreatePCMultichoice();
     ScriptMenu_DisplayPCStartupPrompt();