[Feature] Evolving items Additions (#4725)

* Implement multi-value for evolving sub_types

- Added ability for evolving sub_types to contain multiple values
- Implemented EvolvingItems::Types::NUMBER_OF_KILLS with level for sub_type

* Repair a timer issue preventing proper evolution of items

* Simplify

* Remove extra level of nesting

* Update client_evolving_items.cpp

---------

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

common/database/database_update_manifest.cpp

@@ -6912,6 +6912,18 @@ CREATE TABLE `zone_state_spawns` (
 )",
 		.content_schema_update = false
 	},
+	ManifestEntry{
+		.version = 9308,
+		.description = "2025_add_multivalue_support_to_evolving_subtype.sql",
+		.check = "SHOW COLUMNS FROM `items_evolving_details` LIKE 'sub_type'",
+		.condition = "missing",
+		.match = "varchar(200)",
+		.sql = R"(
+ALTER TABLE `items_evolving_details`
+	CHANGE COLUMN `sub_type` `sub_type` VARCHAR(200) NULL DEFAULT '0' AFTER `type`;
+)",
+		.content_schema_update = true
+	},
 // -- template; copy/paste this when you need to create a new entry
 //	ManifestEntry{
 //		.version = 9228,