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/services/dto/user-data.ts

@@ -0,0 +1,5 @@
+export interface UserData {
+    id: number
+    username: string
+    roles: string[]
+}