Creating Sub-Tasks

Is your feature request related to a problem? Please describe. Right now, I've been using notes as "sub-tasks". Say I had a task in @coding called "Complete CRs". It would be nice to create subtasks to list out the CR names/links within that parent task, instead of what I do now -- that is, leaving notes with that information.

Describe the solution you'd like A new command, something to the effect of tb -t @coding <parent id #> <subtask details>