Zowe CLI commands need to document their return codes

[markcocker]

The Zowe CLI commands are very useful when writing automation scripts. When writing scripts it is crucial to understand if the command completed successfully or failed, and sometimes what type of failure in order to take appropriate action.

As an example, zowe zos-uss issue ssh sets the return code to the same as that returned by the remote command.

All the Zowe CLI commands need to document their return codes in the command line help. For consistency it would be useful to have the possible return codes documented in a new section in the help.

[ChrisBoehmCA]

Thanks. With the exception of the ssh command, all other commands return either 0 on success or 1 on failure. Maybe we should document that in some single location

[markcocker]

I was thinking of man grep as an example. It has a "EXIT STATUS" section.

[github-actions]

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