init multi-window implementation

src/Entity/Browser/Container.php

@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yggverse\Yoda\Entity\Browser;
+
+use \Yggverse\Yoda\Entity\Browser\Container\Tab;
+
+class Container
+{
+    public \GtkBox $gtk;
+
+    // Dependencies
+    public \Yggverse\Yoda\Entity\Browser $browser;
+
+    // Requirements
+    public \Yggverse\Yoda\Entity\Browser\Container\Tab $tab;
+
+    public function __construct(
+        \Yggverse\Yoda\Entity\Browser $browser
+    ) {
+        // Init dependency
+        $this->browser = $browser;
+
+        // Init container
+        $this->gtk = new \GtkBox(
+            \GtkOrientation::VERTICAL
+        );
+
+        // Init tab
+        $this->tab = new Tab(
+            $this
+        );
+
+        $this->gtk->pack_start(
+            $this->tab->gtk,
+            true,
+            true,
+            0
+        );
+    }
+
+    public function refresh()
+    {
+        // @TODO
+    }
+}