docs: add examples for UMD bundles

Author: tsvetomir

examples-standalone/umd-bundles/.gitignore

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+node_modules
+dist

examples-standalone/umd-bundles/README.md

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+# Kendo UI for Angular - UMD Bundles
+Sample application for loading [Kendo UI for Angular](https://github.com/telerik/kendo-angular) as external scripts via Webpack.
+
+### Future of UMD bundles
+Angular is removing UMD bundles with the full transition to Ivy in Angular v13.
+
+You should consider [Webpack Module Federation](https://webpack.js.org/concepts/module-federation/) for sharing scripts between applications.
+See [Microfrontend with Angular and Webpack Module Federation](https://www.steffendielmann.com/2021/05/07/microfrontend-with-angular-and-webpack-module-federation/) for a functional example.
+
+## Run Sample
+
+1. Run `npm ci` to fetch all dependencies
+1. Run `npm run start` to build and run the application
+1. Navigate to http://localhost:8080/dist/