change extension to custom

src/SPC/builder/extension/redis.php

@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\builder\extension;
+
+use SPC\builder\Extension;
+use SPC\util\CustomExt;
+
+#[CustomExt('redis')]
+class redis extends Extension
+{
+    public function getUnixConfigureArg(): string
+    {
+        $arg = '--enable-redis --disable-redis-session';
+        if ($this->builder->getLib('zstd')) {
+            $arg .= ' --enable-redis-zstd --with-libzstd="' . BUILD_ROOT_PATH . '"';
+        }
+        return $arg;
+    }
+}