v0.2.0

Added

• New darkgray_show_reviews command to display timestamps and reviewers of recent
  approved pull request reviews. The command supports options for including repository
  owner reviews and generating monthly statistics.
• Added darkgray_collect_contributors tool to gather GitHub usernames of
  contributors to a repository, including issue authors, PR authors, and commenters.
• A README.rst file and a guide for contributors in CONTRIBUTING.rst.
• In darkgray_update_contributors, support and automatically detect README.md
  in addition to README.rst.
• The repo-summary-post GitHub action now auto-generates a weekly project activity
  summary in the Announcements discussion category.
• Pytest and keyring as dependencies.
• Use uv and pre-commit_ for testing and linting.
• Basic configuration for using use Aider as a coding assistant to develop these tools.
• Ruff configuration settings.