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>

infra/dev/php.ini

@@ -0,0 +1,8 @@
+[Date]
+; Defines the default timezone used by the date functions
+; http://php.net/date.timezone
+date.timezone = Europe/Paris
+
+[Upload]
+upload_max_filesize = 50M
+post_max_size = 55M