LibWeb: Start working on spec-aligned HTML scripting semantics

This patch adds HTML::Script and HTML::ClassicScript (subclass of the
former.)

Userland/Libraries/LibWeb/HTML/Scripting/Script.cpp

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/HTML/Scripting/Script.h>
+
+namespace Web::HTML {
+
+Script::Script(URL base_url)
+    : m_base_url(move(base_url))
+{
+}
+
+Script::~Script()
+{
+}
+
+}