Add remove

[roshan-bajgain]

For the project add and remove I do the following activities:

• 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.
• 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.
• Implement 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. 👍