Document Explicitly how to modify start and end times of tasks in timewarrior

I find I reasonably often forget to terminate or mention start working on task.

If one knows/is easily able to correct that start time, the start and stop times are more representative of reality work times.

So first comment how to change the start and stop times of a task ( with multiple starts and stops).

• Verify if there is a block on setting a start time later than the stop time.

Then determine where to properly document this data for public.

Start by reviewing Timewarrior's documented commands for changing task start and stop times, including intervals with multiple starts and stops. Verify whether a start time later than its stop time is accepted, then identify the appropriate public documentation location in this repository and document the confirmed procedure.

Written by the indexing model from the issue text.