Make `Logic`'s `toString()` method more insightful

[mkorbel1]

Motivation

The current toString for Logic just gives the type, name, and width. It could be more insightful than that.

Desired solution

It could show more information including the current value of the signal, the hierarchy where it is located (if available), and maybe some additional stuff.

Alternatives considered

Maybe it's nicer short and simple?

[quekyj]

@mkorbel1 Let me try to look into this.

[mkorbel1]

Sure, do you have some ideas on what might be good?

[quekyj]

• Adding Hierarchy
• Showing the current value of the signals

[quekyj]

• Logic's Name
• Width