Further work on refactor to interface based scripts

Plugins/PkmnLib.Plugin.Gen7/Scripts/Moves/SubstituteMove.cs

@@ -4,10 +4,10 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
 /// Named 'SubstituteMove' to avoid namespace conflicts with NSubstitute.
 /// </remarks>
 [Script(ScriptCategory.Move, "substitute")]
-public class SubstituteMove : Script
+public class SubstituteMove : Script, IScriptOnSecondaryEffect
 {
     /// <inheritdoc />
-    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    public void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
     {
         var hp = move.User.MaxHealth / 4;
         if (move.User.CurrentHealth > hp)