feat: Adds ability groups, DOT abilities, and combat abilities (#1264)

- [X] Adds `MonsterAbilitySingleTarget`
- [X] Adds `MonsterAbilitySingleTargetDoT`
- [X] Adds monster ability groups with weighted abilities
- [X] Adds rune corruption ability
- [X] Adds poison gas counter ability
- [X] Adds stun attack ability
- [X] Adds throw hatchet counter ability
- [X] Adds fanning fire ability
- [X] Fixes destroy equipment to skip spell channel items

Projects/UOContent/Mobiles/Abilities/SummonLesserUndead.cs

@@ -1,33 +0,0 @@
-namespace Server.Mobiles;
-
-public class SummonLesserUndead : SummonUndead
-{
-    private int _group;
-
-    public override void Trigger(MonsterAbilityTrigger trigger, BaseCreature source, Mobile target)
-    {
-        _group = Utility.Random(2);
-        base.Trigger(trigger, source, target);
-    }
-
-    public override BaseCreature CreateSummon(BaseCreature source)
-    {
-        return _group switch
-        {
-            0 => Utility.Random(4) switch
-            {
-                0 => new Skeleton(),
-                1 => new SkeletalMage(),
-                2 => new Mummy(),
-                3 => new Zombie(),
-            },
-            _ => Utility.Random(4) switch
-            {
-                0 => new Ghoul(),
-                1 => new Spectre(),
-                2 => new Shade(),
-                3 => new Bogle()
-            }
-        };
-    }
-}