add dev commands

src/SPC/command/dev/AllExtCommand.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\command\dev;
+
+use SPC\command\BaseCommand;
+use SPC\store\Config;
+use Symfony\Component\Console\Attribute\AsCommand;
+
+#[AsCommand('dev:ext-all', 'Dev command')]
+class AllExtCommand extends BaseCommand
+{
+    public function configure()
+    {
+    }
+
+    public function handle(): int
+    {
+        $this->output->writeln(implode(',', array_keys(Config::getExts())));
+
+        return 0;
+    }
+}