refactor(core): Introduce naming service (no-changelog) (#7985)

## Summary
Provide details about your pull request and what it adds, fixes, or
changes. Photos and videos are recommended.
Continue breaking down `GenericHelpers.ts`
...

#### How to test the change:
1. ...


## Issues fixed
Include links to Github issue or Community forum post or **Linear
ticket**:
> Important in order to close automatically and provide context to
reviewers

...


## Review / Merge checklist
- [ ] PR title and summary are descriptive. **Remember, the title
automatically goes into the changelog. Use `(no-changelog)` otherwise.**
([conventions](https://github.com/n8n-io/n8n/blob/master/.github/pull_request_title_conventions.md))
- [ ] [Docs updated](https://github.com/n8n-io/n8n-docs) or follow-up
ticket created.
- [ ] Tests included.
> A bug is not considered fixed, unless a test is added to prevent it
from happening again. A feature is not complete without tests.
  >
> *(internal)* You can use Slack commands to trigger [e2e
tests](https://www.notion.so/n8n/How-to-use-Test-Instances-d65f49dfc51f441ea44367fb6f67eb0a?pvs=4#a39f9e5ba64a48b58a71d81c837e8227)
or [deploy test
instance](https://www.notion.so/n8n/How-to-use-Test-Instances-d65f49dfc51f441ea44367fb6f67eb0a?pvs=4#f6a177d32bde4b57ae2da0b8e454bfce)
or [deploy early access version on
Cloud](https://www.notion.so/n8n/Cloudbot-3dbe779836004972b7057bc989526998?pvs=4#fef2d36ab02247e1a0f65a74f6fb534e).

packages/cli/src/credentials/credentials.controller.ts

@@ -2,7 +2,6 @@ import express from 'express';
 import type { INodeCredentialTestResult } from 'n8n-workflow';
 import { deepCopy } from 'n8n-workflow';
 
-import * as GenericHelpers from '@/GenericHelpers';
 import * as ResponseHelper from '@/ResponseHelper';
 import config from '@/config';
 import { EECredentialsController } from './credentials.controller.ee';
@@ -16,6 +15,7 @@ import { listQueryMiddleware } from '@/middlewares';
 import { Logger } from '@/Logger';
 import { NotFoundError } from '@/errors/response-errors/not-found.error';
 import { UnauthorizedError } from '@/errors/response-errors/unauthorized.error';
+import { NamingService } from '@/services/naming.service';
 
 export const credentialsController = express.Router();
 credentialsController.use('/', EECredentialsController);
@@ -38,14 +38,11 @@ credentialsController.get(
  */
 credentialsController.get(
 	'/new',
-	ResponseHelper.send(async (req: CredentialRequest.NewName): Promise<{ name: string }> => {
-		const { name: newName } = req.query;
+	ResponseHelper.send(async (req: CredentialRequest.NewName) => {
+		const requestedName = req.query.name ?? config.getEnv('credentials.defaultName');
 
 		return {
-			name: await GenericHelpers.generateUniqueName(
-				newName ?? config.getEnv('credentials.defaultName'),
-				'credentials',
-			),
+			name: await Container.get(NamingService).getUniqueCredentialName(requestedName),
 		};
 	}),
 );