feat(types,module-sdk): setup authentication module skeleton (#5943)

**What**
- add authentication module skeleton

packages/authentication/src/services/__tests__/index.spec.ts

@@ -0,0 +1,5 @@
+describe("Noop test", () => {
+  it("noop check", async () => {
+    expect(true).toBe(true)
+  })
+})

packages/authentication/src/services/authentication-module.ts

@@ -0,0 +1,32 @@
+import {
+  AuthenticationTypes,
+  DAL,
+  InternalModuleDeclaration,
+  ModuleJoinerConfig,
+} from "@medusajs/types"
+
+import { AuthUser } from "@models"
+
+import { joinerConfig } from "../joiner-config"
+
+type InjectedDependencies = {
+  baseRepository: DAL.RepositoryService
+}
+
+export default class AuthenticationModuleService<
+  TAuthUser extends AuthUser = AuthUser
+> implements AuthenticationTypes.IAuthenticationModuleService
+{
+  protected baseRepository_: DAL.RepositoryService
+
+  constructor(
+    { baseRepository }: InjectedDependencies,
+    protected readonly moduleDeclaration: InternalModuleDeclaration
+  ) {
+    this.baseRepository_ = baseRepository
+  }
+
+  __joinerConfig(): ModuleJoinerConfig {
+    return joinerConfig
+  }
+}

packages/authentication/src/services/index.ts

@@ -0,0 +1 @@
+export { default as AuthenticationModuleService } from "./authentication-module"