Docs: Updates in to-do list feature guide: enable to-do list feature …

…in the snippet. Add links to API.

docs/_snippets/features/todo-list.js

@@ -9,9 +9,9 @@ import { CS_CONFIG } from '@ckeditor/ckeditor5-cloud-services/tests/_utils/cloud
 
 import ClassicEditor from '@ckeditor/ckeditor5-build-classic/src/ckeditor';
 
-// import TodoList from '@ckeditor/ckeditor5-list/src/todolist';
+import TodoList from '@ckeditor/ckeditor5-list/src/todolist';
 
-// ClassicEditor.builtinPlugins.push( TodoList );
+ClassicEditor.builtinPlugins.push( TodoList );
 
 ClassicEditor
 	.create( document.querySelector( '#snippet-todo-list' ), {
@@ -22,7 +22,7 @@ ClassicEditor
 				'|',
 				'bulletedList',
 				'numberedList',
-				// 'todoList',
+				'todoList',
 				'|',
 				'link',
 				'insertTable',

docs/features/todo-lists.md

@@ -4,15 +4,15 @@ category: features
 
 # To-do lists
 
-The to-do list feature lets you create a list of interactive checkboxes with labels. It supports all features of regular lists so you can nest a to-do list together with bulleted and numbered lists in any combination.
+The {@link module:list/todolist~TodoList to-do list} feature lets you create a list of interactive checkboxes with labels. It supports all features of regular lists so you can nest a to-do list together with bulleted and numbered lists in any combination.
 
 ## Demo
 
 {@snippet features/todo-list}
 
 ## Keyboard support
 
-You can check and uncheck a list item by using the <kbd>Ctrl</kbd> + <kbd>Space</kbd> (or <kbd>⌘</kbd> + <kbd>Space</kbd> if you are using macOS) shortcut when the selection is in that item.
+You can check and uncheck a list item by using the <kbd>Ctrl</kbd> + <kbd>Space</kbd> shortcut when the selection is in that item.
 
 ## Installation
 
@@ -78,7 +78,7 @@ For nested lists:
 
 ### Model representation
 
-From the technical point of view, to-do lists are built on top of the list feature. In the CKEditor 5 data model they are represented as a special `listType`, with an optional `todoListChecked` attribute:
+From the technical point of view, to-do lists are built on top of the {@link module:list/list~List list feature}. In the CKEditor 5 data model they are represented as a special `listType`, with an optional `todoListChecked` attribute:
 
 ```html
 <listItem listType="todo">Foo</listItem>