Feature request: add functionality to snooze items.

[tillahoffmann]

Thanks for the great plugin. It would be useful to be able to snooze items (i.e. temporarily hide them until a given date). This seems relatively straightforward from an implementation perspective. Happy to give it a go as a PR, but aligning on the approach would be helpful if you're willing to integrate the proposed functionality into the plugin.

One approach could be to add the #snooze tag to a card and hide it until the associated date (if one exists). Another could be to extend the date syntax, e.g. @{2021-06-03?snooze} to snooze an item. Thoughts?