add routing to module angular code example

Example 1: generate module with routing in angular

ng g m [ModuleName] --routing

Example 2: ng new module w route

// Use this command to create a  lazy-loaded feature module with routing, along with its stub component.

ng generate module <MODULE_NAME> --route <ROUTE> --module app.module

Example 3: how to create app.routing.module.ts in angular 6

ng generate module app-routing --flat --module=app