feat(rust): improve output of `project enroll` command

[adrianbenavides]

Current output

It shows cryptic information that the user won't understand/use. Also the format is not aligned with the rest of the commands.

Proposed output

In this case, it shows more contextualized information:

• The identity name instead of the identifier, because it's what we use as the input in the commands
• The creation and expiration dates for the credential
• The attributes associated with the credential