feat: bootstrap Laravel 13 foundation (Fase 0)

Implement OpenSpec change setup-foundation: Laravel 13 + Filament 5
admin panel, Livewire 4 public site shell, PostgreSQL via Compose,
design tokens, role-based auth, quality gates (Pint/Larastan/Pest),
FrankenPHP Dockerfile, and GitHub Actions CI with five blocking jobs.

Co-authored-by: Cursor <cursoragent@cursor.com>

storage/framework/.gitignore

@@ -0,0 +1,9 @@
+compiled.php
+config.php
+down
+events.scanned.php
+maintenance.php
+routes.php
+routes.scanned.php
+schedule-*
+services.json