* feat: add providedIn for Angular 9+
Adding new option, providedIn, for generator typescript-angular
Keep providedInRoot for backward compatibility but mark as deprecated
for Angular 9+
fix: #6432
* doc: providedIn
infos about providedIn
Mark providedInRoot as deprecated
* doc: run generate-samples for typescript
using typescript-angular-v9-provided-in-any.yaml
* refactor: runned ensure-up-to-date locally
* refactor: api.module.mustache rely on providedIn too
* doc: re-generate samples