Remove display script hook functions, replace them with easy to use interface on Creature class.

src/Battling/ScriptHandling/Script.hpp

@@ -25,10 +25,6 @@ namespace CreatureLib::Battling {
 
         const std::string& GetName() { return _name; }
 
-        virtual void OverrideDisplaySpecies(Creature* creature,
-                                            const CreatureLib::Library::CreatureSpecies** species){};
-        virtual void OverrideDisplayVariant(Creature* creature, const CreatureLib::Library::SpeciesVariant** variant){};
-
         virtual void OnBeforeTurn(const BaseTurnChoice* choice){};
 
         virtual void ChangeAttack(AttackTurnChoice* choice, std::string& attack){};