Add Angular project Example

[jromerob]

Hi, it would be great an angular example as starter

Thanks

[tbouffard]

Hi @jromerob fill free to provide a Pull Request.
You can try to migrate this example: mxGraph integration with Angular 13 https://github.com/Dhawaldeep/mxgraph-angular-tteen
The example uses mxGraph with TypeScript support provided by typed-mxgraph