Core/Garrisons: Implement SMSG_GARRISON_OPEN_TALENT_NPC opcode

Port From (https://github.com/TrinityCore/TrinityCore/commit/4772c4817f1b34553f1c697e2aedc0372af9aea2)

Source/Game/Entities/Creature/Gossip.cs

@@ -746,6 +746,11 @@ namespace Game.Misc
         public int FriendshipFactionID;
     }
 
+    public class GossipMenuItemAddon
+    {
+        public int? GarrTalentTreeID;
+    }
+
     public class PointOfInterest
     {
         public uint Id;

Source/Game/Entities/Player/Player.Quest.cs

@@ -3111,5 +3111,14 @@ namespace Game.Entities
 
             SendPacket(displayToast);
         }
+
+        void SendGarrisonOpenTalentNpc(ObjectGuid guid, int garrTalentTreeId, int friendshipFactionId)
+        {
+            GarrisonOpenTalentNpc openTalentNpc = new();
+            openTalentNpc.NpcGUID = guid;
+            openTalentNpc.GarrTalentTreeID = garrTalentTreeId;
+            openTalentNpc.FriendshipFactionID = friendshipFactionId;
+            SendPacket(openTalentNpc);
+        }
     }
 }

Source/Game/Entities/Player/Player.cs

@@ -2612,6 +2612,13 @@ namespace Game.Entities
                     PlayerTalkClass.SendCloseGossip();
                     SendRespecWipeConfirm(guid, 0, SpecResetType.Glyphs);
                     break;
+                case GossipOptionNpc.GarrisonTalent:
+                {
+                    GossipMenuAddon addon = Global.ObjectMgr.GetGossipMenuAddon(menuId);
+                    GossipMenuItemAddon itemAddon = Global.ObjectMgr.GetGossipMenuItemAddon(menuId, gossipListId);
+                    SendGarrisonOpenTalentNpc(guid, itemAddon != null ? itemAddon.GarrTalentTreeID.GetValueOrDefault(0) : 0, addon != null ? addon.FriendshipFactionID : 0);
+                    break;
+                }
                 case GossipOptionNpc.Transmogrify:
                     GetSession().SendOpenTransmogrifier(guid);
                     break;