Create interactive list

[devMunyi]

• Added a new JavaScript file and imported it as a module: it contain methods related to the status updates (completed: true / false).
• Added event listener to the checkbox (change).
• Updated items object's value for completed key upon user actions.
• Implemented a function for the "Clear all completed" button (use filter() method).
• Store the updated array of items in local storage, so the user gets the correct list values after the page reloads.