clicking "done" creates a task work to mark task completion

[ahdinosaur]

moving out from #120

job story: when i am done with a task and want to mark it as complete, i click "done" and a TaskWork is created to reference the associated TaskRecipe (and optional TaskPlan).

this task should then show as "completed" on any page referencing it.

[michael-smith-nz]

I think I'll work on this next since I ran into this with #138