Implemented and fixed all code required to run at least a single turn.

src/Battling/Models/BattleParty.hpp

@@ -0,0 +1,21 @@
+#ifndef CREATURELIB_BATTLEPARTY_HPP
+#define CREATURELIB_BATTLEPARTY_HPP
+
+#include "CreatureIndex.hpp"
+#include "CreatureParty.hpp"
+
+namespace CreatureLib::Battling {
+    class BattleParty {
+        CreatureParty* _party;
+        std::vector<CreatureIndex> _responsibleIndices;
+
+    public:
+        BattleParty(CreatureParty* party, std::vector<CreatureIndex> responsibleIndices)
+            : _party(party), _responsibleIndices(responsibleIndices) {}
+
+        CreatureParty* GetParty() { return _party; }
+        std::vector<CreatureIndex>& GetResponsibleIndices() { return _responsibleIndices; }
+    };
+}
+
+#endif // CREATURELIB_BATTLEPARTY_HPP