adds data in message model and search param in messages query validator

src/Appwrite/Utopia/Database/Validator/Queries/Messages.php

@@ -12,7 +12,8 @@ class Messages extends Base
         'deliveryErrors',
         'status',
         'description',
-        'data'
+        'data',
+        'search'
     ];
 
     /**

src/Appwrite/Utopia/Response/Model/Message.php

@@ -58,6 +58,15 @@ class Message extends Any
                 'default' => 0,
                 'example' => 1,
             ])
+            ->addRule('data', [
+                'type' => self::TYPE_JSON,
+                'description' => 'Data of the message.',
+                'default' => [],
+                'example' => [
+                    'subject' => 'Welcome to Appwrite',
+                    'content' => 'Hi there, welcome to Appwrite family.',
+                ],
+            ])
             ->addRule('status', [
                 'type' => self::TYPE_STRING,
                 'description' => 'Status of delivery.',