chore: import upstream snapshot with attribution

docs/examples/taskbar.html

@@ -0,0 +1,13 @@
+<h5>Taskbar example</h5>
+<pre class="lang-shell">$hello_world = 'Hello World!'
+
+item(title=hello_world cmd=msg(hello_world))
+separator
+item(title='Command prompt' cmd args='/k echo @hello_world')
+separator
+menu(title='Sub menu')
+{
+  item(title='Open Paint' cmd='paint.exe' arg=sel.path)
+  separator
+  item(title='Open Notepad' cmd='notepad.exe' arg='"@sel.path"')
+}</code></pre>