Added HasVolatileScript function to Creature and Battle.

src/Battling/ScriptHandling/ScriptSet.hpp

@@ -55,6 +55,11 @@ namespace CreatureLib::Battling {
             _lookup.clear();
         }
 
+        bool Has(const std::string& key) {
+            auto find = _lookup.find(key);
+            return find != _lookup.end();
+        }
+
         size_t Count() const { return _scripts.size(); }
 
         const std::vector<Script*>* GetIterator() const { return &_scripts; }