refactor(backend): reorganize domains into Core, Commerce, Ticketing and Shared

app/Shared/MailTest/routes/api.php

@@ -0,0 +1,6 @@
+<?php
+
+use App\Domains\MailTest\Controllers\MailTestController;
+use Illuminate\Support\Facades\Route;
+
+Route::post('{tenant_code}/mail-test/send', MailTestController::class);