Centralize CLI output through shared renderers module with get_console()
and get_err_console() accessors. Introduce ColumnSpec-based table rendering
for plan list, resource list, and actor list commands. Add _FORMAT_HELP
constant and fmt= parameter threading for consistent format handling.
Includes Behave BDD tests for format output validation, Robot Framework
integration tests for CLI formatting consistency, and CHANGELOG entry.
ISSUES CLOSED: #210
