[Merchants] Add New Classic Greed/Faction/Charisma Prices Rule (#4301)

* [Merchants] Add New Classic Greed/Faction/Charisma Prices Rule

* Fix size of greed field.

* Fix { formatting and add {} to one liners

* Fix return type of GetGreedPercent

* Remove code that slipped in from another patch

* Fix greed to be unsigned

* Update client.cpp

* Update client_packet.cpp

* Update client.cpp

Fix bad name in extra log message added manually from merge.

* Update client_packet.cpp

Spacing.

* Update client.cpp

---------

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

common/database/database_update_manifest.cpp

@@ -5608,6 +5608,18 @@ ENGINE=InnoDB
 AUTO_INCREMENT=1
 ;
 )"
+	},
+	ManifestEntry{
+		.version = 9278,
+		.description = "2024_05_06_npc_greed.sql",
+		.check = "SHOW COLUMNS FROM `npc_types` LIKE 'greed'",
+		.condition = "empty",
+		.match = "",
+		.sql = R"(
+ALTER TABLE `npc_types`
+ADD COLUMN `greed` tinyint(8) UNSIGNED NOT NULL DEFAULT 0 AFTER `merchant_id`;
+ )",
+		.content_schema_update = true
 	}
 // -- template; copy/paste this when you need to create a new entry
 //	ManifestEntry{