Core/Objects: Unify Searcher classes into one common implementation

Port From (https://github.com/TrinityCore/TrinityCore/commit/261eb201bf107cef441d9b075e8f23bf0edfbaf0)
Port From (https://github.com/TrinityCore/TrinityCore/commit/526b16fea41fb69a302fdebe8a727e175949f04b)
Port From (https://github.com/TrinityCore/TrinityCore/commit/8b7dce6521323e788ebf28297ec941a6f9bf876f)
Port From (https://github.com/TrinityCore/TrinityCore/commit/5334467f493eb16141f4ad0bce956bc3e19244a0)
Port From (https://github.com/TrinityCore/TrinityCore/commit/1e7725c15b149baaf96731231239769e482ec2ed)
Port From (https://github.com/TrinityCore/TrinityCore/commit/21712f475383f6f3fae107706f5de5195f75b760)

Source/Game/Text/ChatTextBuilder.cs

@@ -7,6 +7,7 @@ using Game.DataStorage;
 using Game.Entities;
 using Game.Networking;
 using Game.Networking.Packets;
+using System;
 using System.Collections.Generic;
 
 namespace Game.Chat
@@ -16,7 +17,7 @@ namespace Game.Chat
         public virtual dynamic Invoke(Locale locale = Locale.enUS) { return default; }
     }
 
-    public class ChatPacketSender : IDoWork<Player>
+    public class ChatPacketSender
     {
         ChatMsg Type;
         Language Language;
@@ -72,6 +73,8 @@ namespace Game.Chat
             }
         }
 
+        public static implicit operator IDoWork<Player>(ChatPacketSender obj) => obj.Invoke;
+
         public void Invoke(Player player)
         {
             if (!player.MeetPlayerCondition(PlayerConditionID))

Source/Game/Text/CreatureTextManager.cs

@@ -447,8 +447,12 @@ namespace Game
         Max = 2,
     }
 
-    public class CreatureTextLocalizer : IDoWork<Player>
+    public class CreatureTextLocalizer
     {
+        Dictionary<Locale, ChatPacketSender> _packetCache = new();
+        MessageBuilder _builder;
+        ChatMsg _msgType;
+
         public CreatureTextLocalizer(MessageBuilder builder, ChatMsg msgType)
         {
             _builder = builder;
@@ -484,9 +488,7 @@ namespace Game
             sender.Invoke(player);
         }
 
-        Dictionary<Locale, ChatPacketSender> _packetCache = new();
-        MessageBuilder _builder;
-        ChatMsg _msgType;
+        public static implicit operator IDoWork<Player>(CreatureTextLocalizer obj) => obj.Invoke;
     }
 
     public class CreatureTextBuilder : MessageBuilder