Support for evolving a mon.

src/Battling/Pokemon/Pokemon.hpp

@@ -56,6 +56,9 @@ namespace PkmnLib::Battling {
         inline ArbUt::BorrowedPtr<const PkmnLib::Library::PokemonSpecies> GetPokemonSpecies() const noexcept {
             return _species.As<const PkmnLib::Library::PokemonSpecies>();
         }
+
+        void Evolve(ArbUt::BorrowedPtr<const Library::PokemonSpecies> mon,
+                    ArbUt::BorrowedPtr<const Library::PokemonForme> forme);
     };
 }