[Feature] Add Barter/Buyer Features (#4405)

* Add Barter/Buyer Features

Adds barter and buyer features, for ROF2 only at this time including item compensation

* Remove FKs from buyer tables

Remove FKs from buyer tables

* Bug fix for Find Buyer and mutli item selling

Update for quantity purchases not correctly providing multi items.
Update for Find Buyer functionality based on zone instancing.
Update buyer messaging
Update buyer LORE duplicate check

* Revert zone instance comment

* Revert zone_id packet size field

* Add zone instancing to barter/buyer

---------

Co-authored-by: Akkadius <akkadius1@gmail.com>

common/events/player_events.h

@@ -60,7 +60,8 @@ namespace PlayerEvent {
 		GUILD_TRIBUTE_DONATE_PLAT,
 		PARCEL_SEND,
 		PARCEL_RETRIEVE,
-		PARCEL_DELETE, 
+		PARCEL_DELETE,
+		BARTER_TRANSACTION,
 		MAX // dont remove
 	};
 
@@ -122,7 +123,8 @@ namespace PlayerEvent {
 		"Guild Tribute Donate Platinum",
 		"Parcel Item Sent",
 		"Parcel Item Retrieved",
-		"Parcel Prune Routine"
+		"Parcel Prune Routine",
+		"Barter Transaction"
 	};
 
 	// Generic struct used by all events
@@ -1081,6 +1083,32 @@ namespace PlayerEvent {
 				);
 		}
 	};
+
+	struct BarterTransaction {
+		std::string                             status;
+		uint32                                  item_id;
+		uint32                                  item_quantity;
+		std::string                             item_name;
+		std::vector<BuyerLineTradeItems_Struct> trade_items;
+		std::string                             buyer_name;
+		std::string                             seller_name;
+		uint64                                  total_cost;
+		// cereal
+		template<class Archive>
+		void serialize(Archive &ar)
+		{
+			ar(
+				CEREAL_NVP(status),
+				CEREAL_NVP(item_id),
+				CEREAL_NVP(item_quantity),
+				CEREAL_NVP(item_name),
+				CEREAL_NVP(trade_items),
+				CEREAL_NVP(buyer_name),
+				CEREAL_NVP(seller_name),
+				CEREAL_NVP(total_cost)
+			);
+		}
+	};
 }
 
 #endif //EQEMU_PLAYER_EVENTS_H