refactor(server/locale): get array of valid locales

resource/locale/server.lua

@@ -1,3 +1,26 @@
+do
+	local locales = {}
+	local system = os.getenv('OS')
+	local command = system and system:match('Windows') and 'dir "' or 'ls "'
+	local path = GetResourcePath(lib.name)
+	local types = path:gsub('//', '/') .. '/locales'
+	local suffix = command == 'dir "' and '/" /b' or '/"'
+	local dir = io.popen(command .. types .. suffix)
+
+	if dir then
+		for line in dir:lines() do
+			local file = line:gsub('([%a%-]+).json', '%1')
+			
+			if file then
+				locales[#locales+1] = file
+			end
+		end
+		dir:close()
+	end
+
+	GlobalState.locales = locales
+end
+
 RegisterCommand('serverlocale', function(_, args, _)
 	if args?[1] then
 		SetResourceKvp('locale', args[1])