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>

frontend/i18n/locales/fr.json

@@ -0,0 +1,48 @@
+{
+    "common": {
+        "loading": "Chargement...",
+        "save": "Enregistrer",
+        "cancel": "Annuler",
+        "delete": "Supprimer",
+        "edit": "Modifier",
+        "create": "Creer",
+        "search": "Rechercher",
+        "confirm": "Confirmer",
+        "yes": "Oui",
+        "no": "Non",
+        "actions": "Actions"
+    },
+    "nav": {
+        "dashboard": "Tableau de bord",
+        "admin": "Administration"
+    },
+    "dashboard": {
+        "title": "Tableau de bord",
+        "welcome": "Bienvenue sur Coltura"
+    },
+    "auth": {
+        "login": "Connexion",
+        "logout": "Deconnexion",
+        "username": "Nom d'utilisateur",
+        "password": "Mot de passe"
+    },
+    "errors": {
+        "auth": {
+            "login": "Identifiants invalides",
+            "session": "Session expir\u00e9e",
+            "logout": "Erreur lors de la deconnexion"
+        },
+        "http": {
+            "get": "Erreur lors du chargement",
+            "post": "Erreur lors de la creation",
+            "put": "Erreur lors de la mise a jour",
+            "patch": "Erreur lors de la modification",
+            "delete": "Erreur lors de la suppression"
+        }
+    },
+    "success": {
+        "auth": {
+            "logout": "Deconnexion reussie"
+        }
+    }
+}