Implements creature switching as turn choice.

src/Battling/ScriptHandling/Script.hpp

@@ -9,6 +9,7 @@
 namespace CreatureLib::Battling {
     class BaseTurnChoice;
     class AttackTurnChoice;
+    class SwitchTurnChoice;
     class ExecutingAttack;
     class Creature;
 
@@ -41,6 +42,8 @@ namespace CreatureLib::Battling {
         virtual void OnSecondaryEffect(const ExecutingAttack* attack, Creature* target, uint8_t hitNumber){};
 
         virtual void OnAfterHits(const ExecutingAttack* attack, Creature* target){};
+
+        virtual void PreventSelfSwitch(const SwitchTurnChoice* choice, bool& result){};
     };
 }