Allow base_cli logger stream and formatter overrides

[codeforester]

Summary

• Add keyword-only stream and formatter overrides to base_cli.configure_logger.
• Export configure_logger from the top-level base_cli package.
• Document the logging extension point for tests and CI wrappers.

Validation

• PYTHONPATH=lib/python:cli/python /Users/rameshhp/.base.d/base/.venv/bin/python -m pytest lib/python/base_cli/tests/test_logging.py -q
• PYTHONPATH=lib/python:cli/python /Users/rameshhp/.base.d/base/.venv/bin/python -m pytest lib/python/base_cli/tests -q
• PYTHONPATH=lib/python:cli/python /Users/rameshhp/.base.d/base/.venv/bin/python -m pylint --rcfile=.pylintrc lib/python/base_cli/__init__.py lib/python/base_cli/logging.py lib/python/base_cli/tests/test_logging.py
• git diff --check

Project Fields

• Priority: P2
• Size: S
• Area: Python
• Initiative: Adoption Polish

Fixes #944