chore: make module loaders DML aware and auto generate joiner config (#7781)

* chore: make module loaders DML aware and auto generate joiner config

* fixes and cleanup

* improve dml entity check

* add unit tests on load resources

* cleanup deps

* cleanup deps

* cleanup Modules

* finalise

* fix modules-sdk jest

* fix modules-sdk jest

* fix import

* fix import

packages/modules/notification/integration-tests/__fixtures__/providers/default-provider.ts

@@ -1,5 +1,5 @@
 import { NotificationTypes } from "@medusajs/types"
-import { AbstractNotificationProviderService } from "@medusajs/utils/src"
+import { AbstractNotificationProviderService } from "@medusajs/utils"
 
 export class NotificationProviderServiceFixtures extends AbstractNotificationProviderService {
   static identifier = "fixtures-notification-provider"