More abilities, refactor IPokemon.SetStatus to pass pokemon that caused the status change

Plugins/PkmnLib.Plugin.Gen7/Scripts/Pokemon/YawnEffect.cs

@@ -3,34 +3,18 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Pokemon;
 [Script(ScriptCategory.Pokemon, "yawn")]
 public class YawnEffect : Script
 {
-    private IPokemon? _pokemon;
     private bool _hasDoneFirstTurn;
 
-    /// <inheritdoc />
-    public override void OnAddedToParent(IScriptSource source)
-    {
-        if (source is IPokemon pokemon)
-        {
-            _pokemon = pokemon;
-        }
-        else
-        {
-            throw new InvalidOperationException("YawnEffect can only be added to a Pokemon.");
-        }
-    }
-
     /// <inheritdoc />
     public override void OnEndTurn(IScriptSource owner, IBattle battle)
     {
-        if (_pokemon == null)
-        {
+        if (owner is not IPokemon pokemon)
             return;
-        }
         if (!_hasDoneFirstTurn)
         {
             _hasDoneFirstTurn = true;
             return;
         }
-        _pokemon.SetStatus(ScriptUtils.ResolveName<Status.Sleep>(), true);
+        pokemon.SetStatus(ScriptUtils.ResolveName<Status.Sleep>(), pokemon);
     }
 }