[AutoPR eventgrid/data-plane] Add eventgrid/data-plane/readme.typescript.md#3585

AutorestCI wants to merge 1 commit intomasterAzure/azure-sdk-for-python:masterfrom

restapi_auto_generated/eventgrid-2018-10-11-218Azure/azure-sdk-for-python:restapi_auto_generated/eventgrid-2018-10-11-218Copy head branch name to clipboard