refactor: move server settings to config

Added support for sv_lan to allow use with FxDK.
Added support for ESX forks with Config.Identifier

config.lua

@@ -6,6 +6,17 @@ if IsDuplicityVersion() then
 	-- If you want to manage extra slots for specific players you can do it by using '/setslots' and '/remslots' commands
 	Config.Slots = 4
 	--------------------
+
+	-- Text to prepend to each character (char#:identifier) - keep it short
+	-- if you modify this, you will need to modify es_extended due to an oversight!
+	-- https://github.com/esx-framework/esx-legacy/blob/main/%5Besx%5D/es_extended/server/classes/player.lua#L17
+	-- if Config.Multichar then self.license = 'license'..identifier:sub(identifier:find(':')) else self.license = 'license:'..identifier end
+	Config.Prefix = 'char'
+	--------------------
+
+	-- Default identifier to store for characters - this should always match es_extended (recommended: license)
+	Config.Identifier = 'license'
+
 else
 	-- Sets the location for the character selection scene
 	-- To set the spawn location for new characters, modify the default value in the `users` SQL table