Providing print helper

[jhlee525]

In the previous version of Ailoy, there was a print function that allowed formatted, human-readable display of MessageOutput.

Likewise, in Agno, there’s also a function called Agent.print_response, which serves a similar purpose — converting structured response data into neatly formatted text.

I think we have to implementing the same kind of feature.
Specifically, we’re thinking about how to transform a MessageOutput or AgentResponse object into a clean, readable text representation.

(While building the “Hello World” example, we realized how useful such a function would be.)