[AutoPR cognitiveservices/data-plane/LUIS/Authoring] Add cognitiveservices\data-plane\LUIS\Authoring\readme.typescript.md#3650

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AutorestCI wants to merge 2 commits intomasterfrom restapi_auto_generated/cognitiveservices-2018-10-18-768

+247-14

Commits on Oct 18, 2018