(Chore): Added a changelog file.

CHANGELOG.md

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+# 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).
+
+## [1.0.3] - 2025-11-22
+
+### Added
+
+- **RAR Support**: Added extraction support for RAR archives (v4 and v5)
+  - Magic byte detection for RAR files
+  - Full extraction with permission preservation
+  - Analysis capabilities for RAR archives
+  - Note: RAR compression not supported due to proprietary format
+- **Semantic Versioning**: Implemented proper semantic versioning system
+  - Version module with Major.Minor.Patch format
+  - `--version` flag to display version information
+  - Version displayed in interactive TUI mode
+- **Command-Line Interface (CLI)**: Added non-interactive CLI mode for automation
+  - `--compress` flag for compression operations
+  - `--extract` flag for extraction operations
+  - `--analyze` flag for archive analysis
+  - `--output` flag for specifying output paths
+  - `--type` flag for archive type selection
+  - `--level` flag for compression level control
+  - `--overwrite` flag for overwrite control
+  - `--preserve-perms` flag for permission preservation
+  - `--exclude` and `--include` flags for filtering
+  - `--verify` flag for integrity verification
+  - `--help` flag for usage information
+- **Remote URL Fetching**: Added ability to download and extract archives from URLs
+  - `--url` flag for remote archive fetching
+  - HTTP/HTTPS support
+  - Progress tracking during download
+  - Automatic format detection and extraction
+  - Support for all archive formats via URL
+
+### Changed
+
+- Updated README.md with comprehensive documentation for new features
+- Enhanced main.go to support both CLI and interactive modes
+- Improved archive type detection to include RAR format
+
+### Dependencies
+
+- Added `github.com/nwaples/rardecode` v1.1.3 for RAR extraction support
+
+## [0.x.x] - Previous Versions
+
+Previous versions included:
+
+- ZIP, TAR, TAR.GZ, and GZIP support
+- Interactive TUI mode
+- Batch operations
+- Archive comparison
+- Format conversion
+- Compression levels
+- Include/exclude patterns
+- Integrity verification