Add a helper function in ioutil to PrintObjectAsTree

[byronchien]

What is the areas you would like to add the new feature to?

Notation CLI

Is your feature request related to a problem?

We print objects as tree in different commands (like for notation list and notation inspect). Would be nice to have a helper function to reuse for this functionality.

What solution do you propose?

Add a helper function to ioutil similar to PrintObjectAsJSON but to print objects as trees.

What alternatives have you considered?

Currently the tree printing logic is implemented separately in each command. We can either implement a general helper in ioutil or take on a new dependency package.

Any additional context?

No response

[Horiodino]

Hey! If no one else is working on this, I'd love to take it on.

[FeynmanZhou]

Hi @Horiodino, thanks for your interest. You are welcome to raise a PR.