Add and remove

[roshan-bajgain]

Add and Remove

• Remove all hardcoded items from the tasks array.
• Create a new JavaScript file for the new functionality.
• Implement a function for adding a new task (add a new element to the array).
• Implement a function for editing task descriptions.
• Implement a function for deleting a task (remove an element from the array).
• Implement a function for the "Clear all completed" button (use filter() method).
• By default new tasks should have the property completed set to false and the property index set to the value of the new array length
• All changes to the To Do List should be saved in local storage.