add zh-Hant translations

closes CNVS-15612

test plan
 - change your user settings to 繁體中文
   and verify that the new translations appear
   properly

Change-Id: I3563b7a11cd8160bec9f811e5cb16d91a4030f22
Reviewed-on: https://gerrit.instructure.com/41511
Reviewed-by: Cody Cutrer <cody@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>
Tested-by: Jenkins <jenkins@instructure.com>
Product-Review: Rob Orton <rob@instructure.com>