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>

.php-cs-fixer.dist.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+use PhpCsFixer\Config;
+use PhpCsFixer\Finder;
+
+$finder = Finder::create()
+    ->in('src')
+    ->notName('Kernel.php')
+;
+
+$rules = [
+    '@Symfony'               => true,
+    '@PSR12'                 => true,
+    '@PHP84Migration'        => true,
+    '@PER-CS'                => true,
+    '@PhpCsFixer'            => true,
+    'strict_param'           => true,
+    'strict_comparison'      => true,
+    'no_useless_else'        => true,
+    'no_useless_return'      => true,
+    'binary_operator_spaces' => [
+        'operators' => [
+            '='  => 'align_single_space_minimal',
+            '||' => 'align_single_space_minimal',
+            '=>' => 'align_single_space_minimal',
+        ],
+    ],
+    'global_namespace_import' => [
+        'import_classes'   => true,
+        'import_constants' => true,
+        'import_functions' => true,
+    ],
+    'modernize_strpos'            => true,
+    'no_superfluous_phpdoc_tags'  => true,
+    'echo_tag_syntax'             => true,
+    'semicolon_after_instruction' => true,
+    'combine_consecutive_unsets'  => true,
+    'ternary_to_null_coalescing'  => true,
+    'declare_strict_types'        => true,
+    'operator_linebreak'          => [
+        'position' => 'beginning',
+    ],
+    'no_unused_imports'                   => true,
+    'single_line_throw'                   => false,
+    'php_unit_test_class_requires_covers' => false,
+];
+
+$config = new Config();
+
+return $config
+    ->setRiskyAllowed(true)
+    ->setRules($rules)
+    ->setFinder($finder)
+;