Move Form and Species to traits, implement a bunch of mocks

src/script_implementations/wasm/export_registry/dynamic_data/pokemon.rs

@@ -63,7 +63,7 @@ register! {
     fn pokemon_get_species(
         env: FunctionEnvMut<WebAssemblyEnv>,
         pokemon: ExternRef<Pokemon>,
-    ) -> ExternRef<Species> {
+    ) -> ExternRef<dyn Species> {
         let species = pokemon.value_func(&env).unwrap().species();
         ExternRef::func_new(&env, &species)
     }