v2.0.0

Feat

• Complete project overhaul with modern Python best practices (a1d1fbe)
• Comprehensive test suite with 100+ tests and >90% coverage (a1d1fbe)
• Full type hints throughout the codebase (a1d1fbe)
• Pre-commit hooks configuration (black, isort, flake8, mypy) (7a60836)
• Multi-unit support (B, KB, MB, GB, TB) with auto-detection (ba7e518)
• Clean/raw byte output mode (-c flag) (ba7e518)
• Recursive directory sizing (-r flag) (ba7e518)
• Force specific units (-u flag) (ba7e518)
• Zero external dependencies - uses only Python standard library (a1d1fbe)

Changed

• Complete CLI rewrite with improved argument parsing (ba7e518)
• Modern packaging using pyproject.toml (removed setup.py) (a1d1fbe)
• Clean project structure with src/ layout (a1d1fbe)
• Improved output formatting with consistent style (ba7e518)
• Better error messages with clear, actionable feedback (7a60836)

Fixed

• Version mismatch across all project files (a1d1fbe)
• Inconsistent code style and formatting issues (7a60836)
• Missing error handling for various edge cases (7a60836)
• Test coverage gaps (a1d1fbe)

Removed

• setup.py - replaced with modern pyproject.toml (a1d1fbe)
• script.py - test script no longer needed (a1d1fbe)
• README.de.md - German documentation consolidated (a1d1fbe)

Security

• Added security scanning with bandit and safety (a1d1fbe)
• Improved input validation and sanitization (7a60836)

Docs

• Complete README rewrite with professional formatting (a1d1fbe)
• Contributing guidelines (ea7bc5e)
• Comprehensive API documentation (a1d1fbe)

Chore

• Remove GitHub templates, workflows, and Homebrew formula (97a79cd)
• Production readiness cleanup (7a60836)
• Prepare for production release (a1d1fbe)