implement bookmarks browser

src/Entity/Browser/Bookmark/Header.php

@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Yoda\Entity\Browser\Bookmark;
+
+use \GtkHeaderBar;
+
+class Header
+{
+    public GtkHeaderBar $gtk;
+
+    public const ACTIONS = true;
+    public const TITLE = 'Bookmark - Yoda';
+    public const SUBTITLE = '';
+
+    public function __construct()
+    {
+        $this->gtk = new GtkHeaderBar;
+
+        $this->gtk->set_show_close_button(
+            $this::ACTIONS
+        );
+
+        $this->gtk->set_title(
+            _($this::TITLE)
+        );
+
+        $this->gtk->set_subtitle(
+            _($this::SUBTITLE)
+        );
+
+        $this->gtk->show();
+    }
+}