[Feature]: Add support for deadlines

[armgoldfish]

What kind of feature do you want?

I'd like to be able to specify a limit date for a task, after which the task is marked as failed or late und not completable through the interface

Additional questions

• I want to work on this feature request

[dromse]

Hi! Yeah, cool feature. I was thinking of adding this to the plugin, maybe by using a tag like #fail/1-02-2025 along with a corresponding editor field.