added Chinese Traditional translation

resources/lang/zh-TW/bills.php

@@ -0,0 +1,36 @@
+<?php
+
+return [
+
+    'bill_number'       => '帳單編號',
+    'bill_date'         => '帳單日期',
+    'total_price'       => '總價',
+    'due_date'          => '到期日',
+    'order_number'      => '訂單編號',
+    'bill_from'         => '帳單來自',
+
+    'quantity'          => '數量',
+    'price'             => '售價',
+    'sub_total'         => '小計',
+    'tax_total'         => '稅額',
+    'total'             => '總計',
+
+    'item_name'         => '項目名稱 | 項目名稱',
+
+    'payment_due'       => '付款到期日',
+    'amount_due'        => '到期金額',
+    'paid'              => '已付款',
+    'histories'         => '歷史記錄',
+    'payments'          => '付款方式',
+    'add_payment'       => '新增付款方式',
+    'download_pdf'      => '下載 PDF格式',
+    'send_mail'         => '傳送電子郵件',
+
+    'status' => [
+        'new'           => '新增',
+        'updated'       => '更新',
+        'partial'       => '部分',
+        'paid'          => '已付款',
+    ],
+
+];