Improve command feedback to user

[Matilda-Yxx]

• Undo command "undo last task successfully" (which task? Want to redo?)
• Add in a task - want to edit details?
• List tasks under a list: what commands can you use to organize the tasks?

[wangzexin]

Add feedback message "you are done for today!" when there is no tasks due today Abandoned

[wangzexin]

Add feedback message "you can type redo to revert the undo command" for each undo command