Further work on refactor to interface based scripts

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

@@ -1,7 +1,7 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Moves;
 
 [Script(ScriptCategory.Move, "drain")]
-public class Drain : Script, IScriptOnInitialize
+public class Drain : Script, IScriptOnInitialize, IScriptOnSecondaryEffect
 {
     public float DrainModifier { get; set; } = 0.5f;
 
@@ -14,7 +14,7 @@ public class Drain : Script, IScriptOnInitialize
     }
 
     /// <inheritdoc />
-    public override void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
+    public void OnSecondaryEffect(IExecutingMove move, IPokemon target, byte hit)
     {
         var user = move.User;
         var damage = move.GetHitData(target, hit).Damage;