Initial commit: Laravel skeleton with sites & accounts spec/plan

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/TestCase.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace Tests;
+
+use Illuminate\Foundation\Testing\TestCase as BaseTestCase;
+
+abstract class TestCase extends BaseTestCase
+{
+    //
+}