Remove creature classes from Library lib, merged with Battling lib.

src/Battling/Models/AttackLearnMethod.hpp

@@ -0,0 +1,11 @@
+#ifndef CREATURELIB_ATTACKLEARNMETHOD_HPP
+#define CREATURELIB_ATTACKLEARNMETHOD_HPP
+
+namespace CreatureLib::Battling {
+    enum class AttackLearnMethod {
+        Unknown,
+        Level
+    };
+}
+
+#endif //CREATURELIB_ATTACKLEARNMETHOD_HPP