feat: add release notes to extension installation

src/structure/administrator/components/com_sportsmanager/src/View/Sportsmanager/HtmlView.php

@@ -24,6 +24,15 @@ class HtmlView extends BaseHtmlView
         ?>
         <h3><?php echo Text::_('COM_SPORTSMANAGER'); ?> &#8211; Created by Sven Nickel | Maintained by DTFB</h3>
         <?php
+
+        $notesPath = JPATH_COMPONENT_ADMINISTRATOR . '/RELEASE_NOTES.md';
+        if (file_exists($notesPath)) {
+            $notes = file_get_contents($notesPath);
+            echo '<div style="padding:1em;"><h3>Release Notes</h3><pre>' .
+                htmlspecialchars($notes) . '</pre></div>';
+        }
+
+
         // Display the template
         parent::display($tpl);
     }

src/structure/sportsmanager.xml

@@ -37,6 +37,7 @@
     <files folder="admin">
       <filename>access.xml</filename>
       <filename>index.html</filename>
+      <filename>RELEASE_NOTES.md</filename>
       <folder>services</folder>
       <folder>src</folder>
 			<folder>tmpl</folder>