Several fixes and improvements.

src/Battling/Battle/Battle.hpp

@@ -19,6 +19,8 @@ namespace PkmnLib::Battling {
                                               .count())
             : CreatureLib::Battling::Battle(library, parties, canFlee, numberOfSides, creaturesPerSide, randomSeed) {}
 
+        virtual ~Battle() = default;
+
         void SetWeather(const ArbUt::StringView& name);
         void ClearWeather();
         const ArbUt::StringView& GetWeatherName() noexcept {