feat : init project Coltura (CRM/ERP)

Symfony 8 + API Platform 4 + Nuxt 4 monorepo.
Backend: User entity, JWT auth, fixtures.
Frontend: login, dashboard, auth middleware, i18n, @malio/layer-ui.
Docker: dev (ports 8083/3003/5436) + prod multi-stage.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/Kernel.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App;
+
+use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
+use Symfony\Component\HttpKernel\Kernel as BaseKernel;
+
+class Kernel extends BaseKernel
+{
+    use MicroKernelTrait;
+}