Core/Units: Added possibility to send emotes to single players

Port From (https://github.com/TrinityCore/TrinityCore/commit/4a6308f5f0737cd42d381096573763459c8393be)

Source/Game/Entities/Unit/Unit.cs

@@ -229,7 +229,7 @@ namespace Game.Entities
             _spellHistory.Update();
         }
 
-        public void HandleEmoteCommand(Emote animId, uint[] spellVisualKitIds = null)
+        public void HandleEmoteCommand(Emote animId, Player target = null, uint[] spellVisualKitIds = null)
         {
             EmoteMessage packet = new();
             packet.Guid = GetGUID();
@@ -240,7 +240,10 @@ namespace Game.Entities
                 if (emotesEntry.AnimId == (uint)Anim.MountSpecial || emotesEntry.AnimId == (uint)Anim.MountSelfSpecial)
                     packet.SpellVisualKitIDs.AddRange(spellVisualKitIds);
 
-            SendMessageToSet(packet, true);
+            if (target != null)
+                target.SendPacket(packet);
+            else
+                SendMessageToSet(packet, true);
         }
 
         public void SendDurabilityLoss(Player receiver, uint percent)

Source/Game/Handlers/ChatHandler.cs

@@ -579,7 +579,7 @@ namespace Game
                     // Only allow text-emotes for "dead" entities (feign death included)
                     if (GetPlayer().HasUnitState(UnitState.Died))
                         break;
-                    GetPlayer().HandleEmoteCommand(emoteAnim, packet.SpellVisualKitIDs);
+                    GetPlayer().HandleEmoteCommand(emoteAnim, null, packet.SpellVisualKitIDs);
                     break;
             }