Core/PacketIO: Implemented CMSG_CONVERSATION_LINE_STARTED

Port From (https://github.com/TrinityCore/TrinityCore/commit/6d9ce8e8baa100ecc7650d0ae56037c131bab2e0)

Source/Game/Scripting/CoreScripts.cs

@@ -760,7 +760,7 @@ namespace Game.Scripting
         public virtual AreaTriggerAI GetAI(AreaTrigger at) { return null; }
     }
 
-    class ConversationScript : ScriptObject
+    public class ConversationScript : ScriptObject
     {
         public ConversationScript(string name) : base(name)
         {
@@ -771,6 +771,9 @@ namespace Game.Scripting
 
         // Called when Conversation is created but not added to Map yet.
         public virtual void OnConversationCreate(Conversation conversation, Unit creator) { }
+
+        // Called when player sends CMSG_CONVERSATION_LINE_STARTED with valid conversation guid
+        public virtual void OnConversationLineStarted(Conversation conversation, uint lineId, Player sender) { }
     }
 
     public class SceneScript : ScriptObject

Source/Game/Scripting/ScriptManager.cs

@@ -1117,6 +1117,14 @@ namespace Game.Scripting
             RunScript<ConversationScript>(script => script.OnConversationCreate(conversation, creator), conversation.GetScriptId());
         }
 
+        public void OnConversationLineStarted(Conversation conversation, uint lineId, Player sender)
+        {
+            Cypher.Assert(conversation != null);
+            Cypher.Assert(sender != null);
+
+            RunScript<ConversationScript>(script => script.OnConversationLineStarted(conversation, lineId, sender), conversation.GetScriptId());
+        }
+
         //SceneScript
         public void OnSceneStart(Player player, uint sceneInstanceID, SceneTemplate sceneTemplate)
         {