release: Version 0.2.0 mit Statistiken und CHANGELOG

- Version erhöht von 0.1.0 auf 0.2.0
- CHANGELOG.md hinzugefügt mit vollständiger Feature-Liste
- Statistiken am Ende: Verarbeitete/geplante/umbenannte Dateien
- Fehler-Zähler für übersprungene/fehlgeschlagene Umbenennungen
- Kommentar-Klarstellung in sanitizer.rs
- Bessere Fehlerbehandlung mit detaillierten Error-Messages

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -0,0 +1,42 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [0.2.0] - 2025-02-10
+
+### Added
+- **CLI**: `--dry-run` as primary option (with `--no-changes` as deprecated alias for backward compatibility)
+- **CLI**: `--special` flag to process symlinks and special files (normally skipped)
+- **Smart Default Excludes**: Automatically ignore `.git`, `.svn`, `node_modules`, `.cache`, `__pycache__`
+- **Double Extensions**: Proper handling of `.tar.gz`, `.tar.bz2`, `.tar.xz`, `.tar.zst`, `.tar.lz`, `.tar.Z`
+- **Parallel Processing**: Using `rayon` for parallel filename cleaning when processing ≥100 files
+- **Write Permission Checks**: Check write permissions before attempting rename operations
+- **Unit Tests**: 9 comprehensive tests for `clean_filename()` covering edge cases
+
+### Fixed
+- **Critical Bug**: Hidden files (like `.gitignore`) are no longer incorrectly renamed to `unnamed.xxx`
+- Leading dot in hidden files is now correctly preserved
+- Fixed all clippy warnings
+
+### Changed
+- Binary renamed from `NameToUnix` to `ntu` (shorter CLI usage)
+- Improved error messages for permission issues
+- Better handling of hidden files with spaces (`.my config` → `.my_config`)
+
+### Performance
+- Parallel processing with rayon for large directory trees (threshold: 100 files)
+- Optimized regex patterns using `once_cell::Lazy`
+
+## [0.1.0] - 2025-03-07
+
+### Added
+- Initial release
+- Basic filename sanitization
+- Configurable replacements via TOML
+- Recursive directory processing
+- Exclude patterns support
+- German umlaut conversion
+- Special identifier preservation (C++, C#)