Support meta on messages

Author: bajb

src/Catalog/ArrayCatalog.php

@@ -18,8 +18,7 @@ public function __construct($_data)
 
   public static function fromFile($filePath)
   {
-    $cat = new static(include($filePath));
-    return $cat;
+    return new static(include($filePath));
   }
 
   public function getMessage($messageId): ?Message

src/Catalog/Message.php

@@ -4,6 +4,7 @@
 class Message
 {
   const DEFAULT_OPTION = '_';
+  const META_OPTION = '__meta';
 
   /**
    * @var array
@@ -41,6 +42,11 @@ public static function fromDefault($default)
     return $msg;
   }
 
+  public function getMeta(): array
+  {
+    return $this->_options[self::META_OPTION] ?? [];
+  }
+
   public function addOption($key, $value)
   {
     $this->_options[$key] = $value;