feat: garage module for client B (step 4)

assessment/customs/clientb/modules/garages/ajax.php

@@ -0,0 +1,17 @@
+<?php
+require_once __DIR__ . '/../../../../src/utils.php';
+$garages = DataManager::getGarages('clientb');
+?>
+<h1>Garages Client B</h1>
+<?php if (empty($garages)): ?>
+    <p>Aucun garage trouvé.</p>
+<?php else: ?>
+    <ul>
+        <?php foreach ($garages as $g): ?>
+            <li class="garage-item" data-garage-id="<?php echo htmlspecialchars($g['id'] ?? ''); ?>">
+                <strong><?php echo htmlspecialchars($g['title'] ?? '-'); ?></strong>
+                - <?php echo htmlspecialchars($g['address'] ?? '-'); ?>
+            </li>
+        <?php endforeach; ?>
+    </ul>
+<?php endif; ?>