More abilities, refactor custom triggers to be typed.

Plugins/PkmnLib.Plugin.Gen7/Scripts/Abilities/GrassPelt.cs

@@ -10,8 +10,8 @@ namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
 public class GrassPelt : Script
 {
     /// <inheritdoc />
-    public override void ChangeDefensiveStatValue(IExecutingMove move, IPokemon target, byte hit, uint offensiveStat,
-        ImmutableStatisticSet<uint> targetStats, Statistic stat, ref uint value)
+    public override void ChangeIncomingMoveDefensiveStatValue(IExecutingMove move, IPokemon target, byte hit,
+        uint offensiveStat, StatisticSet<uint> statisticSet, Statistic stat, ref uint value)
     {
         if (move.Battle.TerrainName == ScriptUtils.ResolveName<Terrain.GrassyTerrain>() && stat == Statistic.Defense)
             value = value.MultiplyOrMax(1.5f);