implement help menu

src/Entity/Browser/Menu/Help.php

@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Yoda\Entity\Browser\Menu;
+
+use \GtkMenu;
+use \GtkMenuItem;
+
+use \Yggverse\Yoda\Entity\Browser\Menu;
+
+class Help
+{
+    // GTK
+    public GtkMenuItem $gtk;
+
+    // Dependencies
+    public Menu $menu;
+
+    // Requirements
+    public Help\About $about;
+    public Help\Gemlog $gemlog;
+    public Help\Issue $issue;
+
+    // Defaults
+    public const LABEL = 'Help';
+
+    public function __construct(
+        Menu $menu
+    ) {
+        // Init dependencies
+        $this->menu = $menu;
+
+        // Init menu item
+        $this->gtk = GtkMenuItem::new_with_label(
+            $this::LABEL
+        );
+
+        // Init submenu container
+        $tab = new GtkMenu;
+
+        // Init about menu item
+        $this->about = new Help\About(
+            $this
+        );
+
+        $tab->append(
+            $this->about->gtk
+        );
+
+        // Init gemlog menu item
+        $this->gemlog = new Help\Gemlog(
+            $this
+        );
+
+        $tab->append(
+            $this->gemlog->gtk
+        );
+
+        // Init issue menu item
+        $this->issue = new Help\Issue(
+            $this
+        );
+
+        $tab->append(
+            $this->issue->gtk
+        );
+
+        $this->gtk->set_submenu(
+            $tab
+        );
+
+        // Render
+        $this->gtk->show();
+    }
+}