feat(reference-auto) : extend auto-reference to composants + formula builder UI

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

migrations/Version20260331100000.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260331100000 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add referenceAuto to composants';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE composants ADD COLUMN IF NOT EXISTS referenceauto VARCHAR(255) DEFAULT NULL');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('ALTER TABLE composants DROP COLUMN IF EXISTS referenceauto');
+    }
+}