Simplify print logic in examples

[SparkssL]

By looking at the code examples, I feel the use of print_panel and print_send_message_result is a bit mixed in with the core agent logic.

These functions are meant for UI/visual feedback, but placing them directly alongside client_node.send_message(...) can be confusing — it makes them look like part of the required messaging flow, which they’re not.

It would be cleaner to separate the printing from the core behavior, or at least make it optional (e.g., with a verbose=True flag).