Further work on the script interface rework

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/SnowWarning.cs

@@ -6,10 +6,10 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
 /// <see href="https://bulbapedia.bulbagarden.net/wiki/Snow_Warning_(Ability)">Bulbapedia - Snow Warning</see>
 /// </summary>
 [Script(ScriptCategory.Ability, "snow_warning")]
-public class SnowWarning : Script
+public class SnowWarning : Script, IScriptOnSwitchIn
 {
     /// <inheritdoc />
-    public override void OnSwitchIn(IPokemon pokemon, byte position)
+    public void OnSwitchIn(IPokemon pokemon, byte position)
     {
         var battleData = pokemon.BattleData;
         if (battleData == null)