Merged PR 22264: adding export dashboard

adding export dashboard

Author: somriar

dist/powerbi-client.d.ts

@@ -1010,6 +1010,7 @@ declare module "powerbi" {
     import { IFilterable } from "ifilterable";
     export { IFilterable, service, factories, models };
     export { Report } from "report";
+    export { Dashboard } from "dashboard";
     export { Tile } from "tile";
     export { IEmbedConfiguration, Embed } from "embed";
     export { Page } from "page";

dist/powerbi.js

@@ -12,6 +12,9 @@ export {
 export {
   Report
 } from './report';
+export {
+  Dashboard
+} from './dashboard';
 export {
   Tile
 } from './tile';