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>

.gitignore

@@ -0,0 +1,46 @@
+###> symfony/framework-bundle ###
+/.env.local
+/.env.local.php
+/.env.*.local
+/config/secrets/prod/prod.decrypt.private.php
+/public/bundles/
+/var/
+/vendor/
+###< symfony/framework-bundle ###
+
+###> lexik/jwt-authentication-bundle ###
+/config/jwt/*.pem
+###< lexik/jwt-authentication-bundle ###
+
+###> phpunit ###
+/phpunit.xml
+.phpunit.cache
+###< phpunit ###
+
+###> friendsofphp/php-cs-fixer ###
+.php-cs-fixer.cache
+###< friendsofphp/php-cs-fixer ###
+
+###> docker ###
+infra/dev/.env.docker.local
+###< docker ###
+
+###> node ###
+frontend/node_modules/
+frontend/.nuxt/
+frontend/.output/
+frontend/dist/
+###< node ###
+
+###> ide ###
+.idea/
+.vscode/
+###< ide ###
+
+###> logs ###
+LOG/
+###< logs ###
+
+###> claude ###
+.claude/
+###< claude ###