layout: execute crew updates

[whoabuddy]

• [ ] create a box for input, only show after button is clicked, above result
• [ ] find a way to better illustrate what adding agents/tasks does here in relation to the crew and execution, some anticipated user questions:
  • [ ] how many agents should I create?
  • [ ] what order are the tasks completed?
  • [ ] why do I only see a final result?