Further work on refactor to interface based scripts

Plugins/PkmnLib.Plugin.Gen7/Scripts/Battle/Gravity.cs

@@ -1,7 +1,7 @@
 namespace PkmnLib.Plugin.Gen7.Scripts.Battle;
 
 [Script(ScriptCategory.Battle, "gravity")]
-public class Gravity : Script
+public class Gravity : Script, IScriptFailIncomingMove
 {
     private int _turns = 5;
 
@@ -18,7 +18,7 @@ public class Gravity : Script
     }
 
     /// <inheritdoc />
-    public override void FailIncomingMove(IExecutingMove move, IPokemon target, ref bool fail)
+    public void FailIncomingMove(IExecutingMove move, IPokemon target, ref bool fail)
     {
         if (move.UseMove.HasFlag("gravity"))
             fail = true;