Refactor move selection prevention to use interface

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

@@ -1,7 +1,7 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Pokemon;
 
 [Script(ScriptCategory.Pokemon, "heal_block")]
-public class HealBlockEffect : Script
+public class HealBlockEffect : Script, IScriptPreventMoveSelection
 {
     private int _duration;
 
@@ -19,7 +19,7 @@ public class HealBlockEffect : Script
     }
 
     /// <inheritdoc />
-    public override void PreventMoveSelection(IMoveChoice choice, ref bool prevent)
+    public void PreventMoveSelection(IMoveChoice choice, ref bool prevent)
     {
         if (choice.ChosenMove.MoveData.HasFlag("heal"))
             prevent = true;