docs: show the CLI example's JSON output in usage.rst

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: derek73

docs/usage.rst

@@ -106,6 +106,7 @@ Command line
 ::
 
     $ python -m nameparser --json "Doe, John"
+    {"title": "", "given": "John", "middle": "", "family": "Doe", "suffix": "", "nickname": "", "maiden": ""}
 
 Add ``--locale`` to parse with a locale pack (for example ``--locale
 ru``); see :doc:`locales`.