feat: External Secrets storage for credentials (#6477)

Github issue / Community forum post (link here to close automatically):

---------

Co-authored-by: Romain Minaud <romain.minaud@gmail.com>
Co-authored-by: Valya Bullions <valya@n8n.io>
Co-authored-by: Csaba Tuncsik <csaba@n8n.io>
Co-authored-by: Giulio Andreini <g.andreini@gmail.com>
Co-authored-by: Omar Ajoue <krynble@gmail.com>

packages/cli/src/SecretsHelpers.ts

@@ -0,0 +1,41 @@
+import type { IDataObject, SecretsHelpersBase } from 'n8n-workflow';
+import { Service } from 'typedi';
+import { ExternalSecretsManager } from './ExternalSecrets/ExternalSecretsManager.ee';
+
+@Service()
+export class SecretsHelper implements SecretsHelpersBase {
+	constructor(private service: ExternalSecretsManager) {}
+
+	async update() {
+		if (!this.service.initialized) {
+			await this.service.init();
+		}
+		await this.service.updateSecrets();
+	}
+
+	async waitForInit() {
+		if (!this.service.initialized) {
+			await this.service.init();
+		}
+	}
+
+	getSecret(provider: string, name: string): IDataObject | undefined {
+		return this.service.getSecret(provider, name);
+	}
+
+	hasSecret(provider: string, name: string): boolean {
+		return this.service.hasSecret(provider, name);
+	}
+
+	hasProvider(provider: string): boolean {
+		return this.service.hasProvider(provider);
+	}
+
+	listProviders(): string[] {
+		return this.service.getProviderNames() ?? [];
+	}
+
+	listSecrets(provider: string): string[] {
+		return this.service.getSecretNames(provider) ?? [];
+	}
+}