First couple abilities implemented

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

@@ -0,0 +1,17 @@
+namespace PkmnLib.Plugin.Gen7.Scripts.Abilities;
+
+[Script(ScriptCategory.Ability, "beast_boost")]
+public class BeastBoost : Script
+{
+    /// <inheritdoc />
+    public override void OnOpponentFaints(IExecutingMove move, IPokemon target, byte hit)
+    {
+        var highestStat = move.User.BoostedStats.OrderByDescending(x => x.value).First().statistic;
+        EventBatchId batchId = new();
+        move.User.BattleData?.Battle.EventHook.Invoke(new AbilityTriggerEvent(move.User)
+        {
+            BatchId = batchId,
+        });
+        move.User.ChangeStatBoost(highestStat, 1, true, batchId);
+    }
+}