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/wild_encounter.c

@@ -852,7 +852,7 @@ bool8 UpdateRepelCounter(void)
         VarSet(VAR_REPEL_STEP_COUNT, steps);
         if (steps == 0)
         {
-            ScriptContext1_SetupScript(EventScript_RepelWoreOff);
+            ScriptContext_SetupScript(EventScript_RepelWoreOff);
             return TRUE;
         }
     }