fix(mate): exclude auto-managed mate/extensions.php from php-cs-fixer

mate/extensions.php is regenerated by `mate discover` (per its header), so
php-cs-fixer must not rewrite it — the declare(strict_types) it had added would
be clobbered on the next discover and re-flagged on the next run. Exclude it
via the Finder and restore the generated form. mate/config.php is the user's
own service config (not auto-managed) and stays formatted.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: turegjorup

.php-cs-fixer.dist.php

@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 // This file is copied from config/symfony/php/.php-cs-fixer.dist.php in https://github.com/itk-dev/devops_itkdev-docker.
 // Feel free to edit the file, but consider making a pull request if you find a general issue with the file.
 
@@ -12,6 +14,10 @@
 $finder->in(__DIR__);
 // … that are not ignored by VCS
 $finder->ignoreVCSIgnored(true);
+// mate/extensions.php is regenerated by `mate discover` (see its header), so
+// excluding it keeps php-cs-fixer from fighting the auto-managed form (e.g.
+// re-adding declare(strict_types) that the generator omits).
+$finder->notPath('mate/extensions.php');
 
 $config = new PhpCsFixer\Config();
 $config->setFinder($finder);

mate/extensions.php

@@ -1,7 +1,5 @@
 <?php
 
-declare(strict_types=1);
-
 // This file is managed by 'mate discover'
 // You can manually edit to enable/disable extensions