Make the Hermes CLI output less verbose

[adizere]

Problem

Currently all Hermes interactive CLIs (i.e., everything except for the start CLI) relies on the Conclude module to intermediate the output. This module has two modes:

1. if --json is specified, then the module will ensure all CLI output is serialized in JSON
2. if --json is not specified (the default), then the module will serialize everything via its Debug implemenetation.

We already noticed that the Debug impl are too verbose (eg #1559) and in PR #2167 we made additional modifications to override the Debug impl and make it less verbose for some packet events.

Potential solution

We should continue that work described above and refactor Conclude so that by default it no longer works with Debug but instead with Display implementations, making the output more compact and easier to understand for developers. As a side note, most operators do not use JSON output, so this request is not only for developers but also relayer operators.

Original discussion

Not sure we need the Debug impl here. I removed the derive since it was not being used for anything.

We can re-add the derive(Debug) later on if needed. But I would actually prefer to make Output work with Display instead of Debug. The reason is that with Debug the output is too verbose and it's difficult to parse the logs, so we're forced to override of impl Debug for X to make output more concise (like we do in this PR and in here #1944). Going with Display instead of Debug will be better, but that would require some bigger refactoring (which we can do with #594 if we see the need).

Originally posted by @adizere in #2167 (comment)