Use copy instead of symlink for path repositories in CI

Symlinks cause infinite recursion when bridges depend on symfony/ai-platform
because the symlink includes the entire src/platform directory with all bridges,
and each bridge has its own vendor folder.

Author: OskarStark

.github/build-packages.php

@@ -49,6 +49,9 @@
             $repositories[] = [
                 'type' => 'path',
                 'url' => $packageInfo['path'],
+                'options' => [
+                    'symlink' => false,
+                ],
             ];
             $key = isset($packageData['require'][$packageName]) ? 'require' : 'require-dev';
             $packageData[$key][$packageName] = '@dev';