Fix the visualization of data

[krucod3]

We have to review and improve the visualization of data in the SDK:

• In a lot of places we don't actually need a Display function and a debug is completely sufficient
• Some Display implementations show only parts of the objects, e.g., impl fmt::Display for ResponseType {
• Some tests use the Display for comparison instead of Eq (or PartialEq if needed), e.g. in response.rs

Current Behavior

Expected Behavior

Steps to Reproduce

Context (Environment)

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Additional Information

Final result

To be filled by the one closing the issue.