Do not fail when jira issue list finds nothing

[olivergondza]

I am using jira-cli for scripting. When jira issue list --jql finds 0 issues, it issues an error message and exit code 1.

They both can be ignored, of course, though I would like to distinguish an empty result list (an ok condition for my use-case) from an actual error with the command invocation (that too fails with exit code 1).

I am not sure what consequences would it have to change the behavior for existing clients. Alternatively, an extra flag of --fail-if-nothing-found=false would come in handy.