feat(core): Enforce config file permissions on startup (#11328)

Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <netroy@users.noreply.github.com>

packages/core/test/utils.ts

@@ -1,12 +1,11 @@
 import { mock } from 'jest-mock-extended';
 import { Duplex } from 'stream';
 import type { DeepPartial } from 'ts-essentials';
+import type { Constructable } from 'typedi';
 import { Container } from 'typedi';
 
-import type { Class } from '@/Interfaces';
-
 export const mockInstance = <T>(
-	constructor: Class<T>,
+	constructor: Constructable<T>,
 	data: DeepPartial<T> | undefined = undefined,
 ) => {
 	const instance = mock<T>(data);