[Request] Subtask display

[dubiao]

Is your feature request related to a problem? Please describe.

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◇  Do you want to apply this plan? [0]
│  Yes
◇  Start installing the missing module [1]
│
◇  Completed: Install formula: git [2]
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Describe the solution you'd like
When doing something like this, I would like the install task [2] to be a subtask of [1], maybe there cloud be some space before the item or something like an unfolded tree. I checked the doc but did not find a method.

Describe alternatives you've considered

│
◇  Do you want to apply this plan? [0]
│  Yes
◇  Start installing the missing module [1]
│
│ ----- ◇  Completed: Install formula: python
│ ----- ◇  Completed: Install formula: Android SDK
│