Support mark as read by token API (#757)

line/line-openapi#115

## Support for "Mark as Read" by Token API

We have released a new **Mark as Read API** that allows developers to
mark a user’s messages as read.
Previously, this functionality was available only to partners, but it is
now publicly available.

When your server receives a user message via Webhook, the `MessageEvent`
will include a new field: `markAsReadToken`.
By calling the Mark as Read API with this token, all messages in the
chat room **up to and including** that message will be marked as read.

> **Note:** This feature assumes that your service uses the chat feature
through Official Account Manager.
> If chat is not enabled, messages from users are automatically marked
as read, making this API unnecessary.

For more details, please refer to the release note:
https://developers.line.biz/en/news/2025/11/05/mark-as-read/

---------

Co-authored-by: github-actions <[email protected]>

Author: github-actions[bot]

docs/classes/LINE-Clients-MessagingApi-Api-MessagingApiApi.html

@@ -283,6 +283,13 @@ <h4 id="toc-methods">
 </dt>
 <dd>Test attribute &quot;duration&quot;</dd>
 
+            <dt class="phpdocumentor-table-of-contents__entry -method -public">
+    <a class="" href="classes/LINE-Webhook-Test-Model-AudioMessageContentTest.html#method_testPropertyMarkAsReadToken">testPropertyMarkAsReadToken()</a>
+    <span>
+                                &nbsp;: mixed    </span>
+</dt>
+<dd>Test attribute &quot;markAsReadToken&quot;</dd>
+
     </dl>
 
 
@@ -541,6 +548,41 @@ <h4 class="phpdocumentor-element__name" id="method_testPropertyDuration">
 
 
 
+</article>
+                    <article
+        class="phpdocumentor-element
+            -method
+            -public
+                                                        "
+>
+    <h4 class="phpdocumentor-element__name" id="method_testPropertyMarkAsReadToken">
+        testPropertyMarkAsReadToken()
+        <a href="classes/LINE-Webhook-Test-Model-AudioMessageContentTest.html#method_testPropertyMarkAsReadToken" class="headerlink"><i class="fas fa-link"></i></a>
+
+    </h4>
+    <aside class="phpdocumentor-element-found-in">
+    <abbr class="phpdocumentor-element-found-in__file" title="src/webhook/test/Model/AudioMessageContentTest.php"><a href="files/src-webhook-test-model-audiomessagecontenttest.html"><abbr title="src/webhook/test/Model/AudioMessageContentTest.php">AudioMessageContentTest.php</abbr></a></abbr>
+    :
+    <span class="phpdocumentor-element-found-in__line">118</span>
+
+    </aside>
+
+        <p class="phpdocumentor-summary">Test attribute &quot;markAsReadToken&quot;</p>
+
+    <code class="phpdocumentor-code phpdocumentor-signature ">
+    <span class="phpdocumentor-signature__visibility">public</span>
+                    <span class="phpdocumentor-signature__name">testPropertyMarkAsReadToken</span><span>(</span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">mixed</span></code>
+
+    <div class="phpdocumentor-label-line">
+        </div>
+    
+    
+    
+    
+
+    
+
+    
 </article>
             </section>
 
@@ -664,6 +706,7 @@ <h4 class="phpdocumentor-element__name" id="method_testPropertyDuration">
                                             <li class=""><a href="classes/LINE-Webhook-Test-Model-AudioMessageContentTest.html#method_testAudioMessageContent">testAudioMessageContent()</a></li>
                                             <li class=""><a href="classes/LINE-Webhook-Test-Model-AudioMessageContentTest.html#method_testPropertyContentProvider">testPropertyContentProvider()</a></li>
                                             <li class=""><a href="classes/LINE-Webhook-Test-Model-AudioMessageContentTest.html#method_testPropertyDuration">testPropertyDuration()</a></li>
+                                            <li class=""><a href="classes/LINE-Webhook-Test-Model-AudioMessageContentTest.html#method_testPropertyMarkAsReadToken">testPropertyMarkAsReadToken()</a></li>
                                     </ul>
             </li>
                     </ul>