Separate checklists and tasks

Having checklists that aren't treated as tasks and stay checked on the note would be very useful.

At least for my use cases, I'd also generally like completed tasks to stay as tasks and just have a completed state on the note. Completed tasks getting deleted from the note body is a good behavior primarily for tasklist notes, IMO. If the tasks are embedded within a note that's project reference or the like, deleting them from the note body is actively counterproductive.