migrate fre/tests/test_fre_cmor_cli.py to fremorizer/tests/test_cli.py

Agent-Logs-Url: https://github.com/ilaflott/fremorizer/sessions/b3e2e5fd-8756-4389-b553-f71f955e495b

Co-authored-by: ilaflott <6273252+ilaflott@users.noreply.github.com>

Author: Copilot