StyleGuide - Having the root /app folder export a barrel

[Foxandxss]

The CLI has a barrel in /src/app where they export the app.component.ts and some environment. Also the main.ts is at /src and not /src/app.

So we have to move main.ts up one level and then see if we want the app folder to export a barrel and if so, what should it export, only app.component or each subfolder (features and shared).

[wardbell]

Closing because (a) I don't think there should be a barrel with nothing but a component in it and (b) this should be handled by a PR (when we have proper resolution).

Happy to reopen if you insist ... but I'd rather have your PR