1.0.0

Added

• Support for comparing tar archives (.tar, .tar.gz, .tar.bz2, .tar.xz)
  in addition to zip archives and plain directories
• Unit test suite (pytest) covering the core comparison logic and the CLI
• hatch test / pytest integration in hatch run lint:check

Changed

• Migrated packaging from setup.py to pyproject.toml with hatch as build backend
• Raised minimum supported Python version to 3.11 (developed and tested with 3.13)
• Added a restrictive lint environment (black, bandit, ruff, flake8, pylint, mypy --strict) via hatch run lint:check
• Added GitHub Actions workflows for linting across supported Python versions and for publishing to PyPI via Trusted Publishing
• Relicensed from GPL-3.0-or-later to MIT
• Unreadable files (broken symlinks, missing permissions) are now skipped with
  a warning on stderr instead of aborting the whole comparison
• folderdiff CLI now prints a clean error message and exits with status 2
  instead of a raw traceback when the comparison itself fails

Fixed

• Files with duplicate content could be silently dropped from the result
  when computing moved/removed/added file sets, hiding genuinely removed or
  added files whenever another file with identical content existed
• --prefix had no effect when comparing two plain directories; it only
  ever worked for the zip-archive side
• A corrupt zip archive's CRC-32 self-test result was computed but never
  checked, so a bad archive still crashed later with an unhandled exception
• Fixed "profix" typo in the --prefix help text
• Folder-mode relative paths used os.sep while zip entries always use /,
  so comparing a zip archive against a directory would report every file in
  a subfolder as changed on platforms where os.sep != "/"
• A named pipe or other special file in the compared directory tree caused
  open() to block indefinitely, hanging the whole comparison; such entries
  are now skipped with a warning instead
• Zip archive members were read fully into memory before hashing, which
  could exhaust memory on a maliciously crafted archive; hashing is now
  streamed in fixed-size chunks