Add ext-mbstring,ext-mbregex,onig

src/Package/Extension/mbstring.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Package\Extension;
+
+use StaticPHP\Attribute\Package\CustomPhpConfigureArg;
+use StaticPHP\Attribute\Package\Extension;
+use StaticPHP\Package\PackageInstaller;
+
+#[Extension('mbstring')]
+class mbstring
+{
+    #[CustomPhpConfigureArg('Linux')]
+    #[CustomPhpConfigureArg('Darwin')]
+    public function getUnixConfigureArg(bool $shared, PackageInstaller $installer): string
+    {
+        $arg = '--enable-mbstring' . ($shared ? '=shared' : '');
+        $arg .= $installer->isPackageResolved('ext-mbregex') === false ? ' --disable-mbregex' : ' --enable-mbregex';
+        return $arg;
+    }
+}