this new command will be called by cron-like process to clean purge old logs and old mails. All files were formatted and mail_utils was renamed in utils since it now defines utility function not only for mail functions.
add cli using typer, its option --input-dir, --input-files and --output-dir, add related tests, add logging, add and update of the package version in `logwatcher/__init__.py`, correct templates in `reporter.py`
maurane