Adds more abilities

Scripts/Abilities/ArenaTrap.as

@@ -1,4 +1,5 @@
 namespace Gen7 {
+    [Ability effect=ArenaTrap]
     class ArenaTrap : PkmnScript {
         void PreventOpponentRunAway(FleeTurnChoice@ choice, bool &inout block){
             if (block) return;

Scripts/Abilities/AromaVeil.as

@@ -0,0 +1,11 @@
+namespace Gen7 {
+    [Ability effect=AromaVeil]
+    class AromaVeil {
+        void PreventSecondaryEffects(ExecutingMove@ move, Pokemon@, uint8, bool &inout prevent){
+            // TODO: This only prevents disabling moves, not other things that block move uses.
+            if (move.UseMove.HasFlag("limit_move_choice")){
+                prevent = true;
+            }
+        }
+    }
+}

Scripts/Abilities/AuraBreak.as

@@ -0,0 +1,10 @@
+namespace Gen7 {
+    class AuraBreakAbility : PkmnScript {
+        void OnSecondaryEffect(ExecutingMove@, Pokemon@ target, uint8){
+            auto battle = target.Battle;
+            battle.RemoveVolatile("FairyAura");
+            battle.RemoveVolatile("DarkAura");
+            battle.AddVolatile("AuraBreak");
+        }
+    }
+}

Scripts/Abilities/BadDreams.as

@@ -0,0 +1,26 @@
+namespace Gen7 {
+    [Ability effect=BadDreams]
+    class BadDreams : PkmnScript {
+        void OnEndTurn(){
+            auto owner = cast<Pokemon@>(GetOwner());
+            auto ownerSide = owner.BattleSide;
+            auto battle = owner.Battle;
+            if (battle is null) return;
+            for (uint64 i = 0; i < battle.Sides.Length; i++){
+                auto side = battle.Sides[i];
+                if (side is ownerSide){
+                    continue;
+                }
+                for (uint64 j = 0; j < side.Pokemon.Length; j++){
+                    auto opponent = side.Pokemon[j];
+                    if (opponent is null || opponent.IsFainted){
+                        continue;
+                    }
+                    if (opponent.Status == "Sleep"){
+                        opponent.Damage(uint(opponent.MaxHealth / 8), DamageSource::Misc);
+                    }
+                }
+            }
+        }
+    }
+}