Icalendar-events-cli

Features
- Filter events by description and location
- Support local file URLs (`file://<abs. path to local file>`)
- Support configuration via JSON (based on [jsonargparse](https://jsonargparse.readthedocs.io/))

Infrastructure
- Rework to [hyper-modern structure](https://cjolowicz.github.io/posts/hypermodern-python-01-setup/) with [python-pdm](https://pdm-project.org/)
- Implement tests (100% coverage)
- Publish to [PyPI](https://pypi.org/) index

Fixes
- Invalid start- and end-date in [7](https://github.com/waldbaer/icalendar-events-cli/pull/7)

Dependencies
- Bump recurring-ical-events from 3.3.3 to 3.4.1 in [4](https://github.com/waldbaer/icalendar-events-cli/pull/4)

Initial Release

Features
- Download and parse iCalendar files.
- Filter events with start- and end date.
- Filter events with RegEx on the summary (title) text.
- Different output formats: JSON, logger