add option for due date with task creation

[binderth]

Describe the feature you'd like
I'd like to not only add a reminder for a task, but the due date.

(1) the current "-r" option will add a reminder for that specific time (here I chose "-r evening").
(2) this would be the due date, which I'd like to set.

Bonus
If possible, the possibility to also add all the other task-specific meta-data would be nice!
Especially the "category"-option would be great.