[Bug] Item Purchase Offset when multiple buyers are buying at the same time. (#4628)

* [Bug] Item Purchase Offset when multiple buyers are buying at the same time.

- Much of the code lifted from TAKP/P2002 and adapted
- Needs Testing
- This should help prevent situations where multiple people are purchasing items from a merchant and both attempt to purchase the same temp merchant or limited item, it should result in the later person recieving a notice that the item no longer exists and refreshes the merchant table.
- Updated strings

* fix formatting

* Push

* Update client.cpp

* Update database_update_manifest.cpp

* Update database_update_manifest.cpp

* Update database_update_manifest.cpp

* Update client.cpp

---------

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

zone/string_ids.h

@@ -286,6 +286,7 @@
 #define BEGINS_TO_SHINE				1238	//Your %1 begins to shine.
 #define CANT_FIND_PLAYER			1276 	//I can't find a player named %1!
 #define SURNAME_REJECTED			1374	//Your new surname was rejected. Please try a different name.
+#define ALREADY_SOLD				1376	//The item you were interested in has already been sold.
 #define GUILD_DISBANDED				1377    //Your guild has been disbanded!  You are no longer a member of any guild.
 #define DUEL_DECLINE				1383	//%1 has declined your challenge to duel to the death.
 #define DUEL_ACCEPTED				1384	//%1 has already accepted a duel with someone else.
@@ -308,6 +309,7 @@
 #define PLAYER_CHARMED				1461	//You lose control of yourself!
 #define TRADER_BUSY					1468	//That Trader is currently with a customer. Please wait until their transaction is finished.
 #define SENSE_CORPSE_DIRECTION		1563	//You sense a corpse in this direction.
+#define DUPE_LORE_MERCHANT			1573	//%1 tells you, 'You already have the lore item, %2, on your person, on your shroud, in the bank, in a real estate, or as an augment in another item.  You cannot have more than one of a particular lore item at a time.'
 #define QUEUED_TELL					2458	//[queued]
 #define QUEUE_TELL_FULL				2459	//[zoing and queue is full]
 #define TRADER_BUSY_TWO             3192    //Sorry, that action cannot be performed while trading.