refactor(core): Use an IoC container to manage singleton classes [Part-2] (no-changelog) (#5690)

* use typedi for UserManagementMailer

* use typedi for SamlService

* fix typos

* use typedi for Queue

* use typedi for License

* convert some more code to use typedi

packages/cli/src/UserManagement/email/NodeMailer.ts

@@ -3,9 +3,9 @@ import type { Transporter } from 'nodemailer';
 import { createTransport } from 'nodemailer';
 import { ErrorReporterProxy as ErrorReporter, LoggerProxy as Logger } from 'n8n-workflow';
 import config from '@/config';
-import type { MailData, SendEmailResult, UserManagementMailerImplementation } from './Interfaces';
+import type { MailData, SendEmailResult } from './Interfaces';
 
-export class NodeMailer implements UserManagementMailerImplementation {
+export class NodeMailer {
 	private transport?: Transporter;
 
 	async init(): Promise<void> {