feat : init Central project — Symfony 8 + Nuxt 4 + Docker starter

Same architecture as Lesstime: API Platform 4, JWT auth, @malio/layer-ui,
PostgreSQL 16, Docker Compose (ports 8083/3003/5436), dark mode theme.

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

frontend/middleware/auth.global.ts

@@ -0,0 +1,16 @@
+export default defineNuxtRouteMiddleware(async (to) => {
+    const auth = useAuthStore()
+    const isLogin = to.path === '/login'
+
+    if (!auth.checked) {
+        await auth.ensureSession()
+    }
+
+    if (!isLogin && !auth.isAuthenticated) {
+        return navigateTo('/login')
+    }
+
+    if (isLogin && auth.isAuthenticated) {
+        return navigateTo('/')
+    }
+})