docs: update changelog for release

Author: AndersonBY

CHANGELOG.md

@@ -0,0 +1,61 @@
+# 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).
+
+## [Unreleased]
+
+### Added
+- 🚀 **Release Management System**: Interactive release wizard with automated changelog generation and multi-step validation
+- 🏗️ **Enhanced CI/CD Pipeline**: Comprehensive GitHub Actions workflows with multi-Python version testing (3.10, 3.11, 3.12)
+- 🐳 **Docker Support**: Complete containerization with Dockerfile and comprehensive usage instructions for easy deployment
+- 📊 **Advanced Output Options**: New CLI formatting options including parsable style, stdout output, and comment removal capabilities
+- 🔧 **Standard Input Support**: `--stdin` option enables reading file paths from standard input for pipeline integration
+- 🌳 **Tree-sitter Code Compression**: Intelligent AST-based Python code compression with multiple modes (interface, signature, minimal) for optimized LLM token usage and enhanced structural parsing
+- 🤖 **MCP Server Integration**: Enhanced Model Context Protocol (MCP) server functionality with new tools and improved AI development workflow integration
+- 📋 **Contributing Guidelines**: Added comprehensive contribution documentation for developers
+
+### Changed  
+- 📖 **Documentation Improvements**: Updated README with comprehensive Docker usage instructions and `--stdin` option guidance
+- 🎯 **Code Quality Standards**: Integrated Ruff linting configuration across codebase for consistent formatting and linting
+- 🧪 **Test Infrastructure**: Enhanced test environment with improved logger state management and output handling
+
+### Fixed
+- 🐛 **Configuration Validation**: Fixed RepomixConfigOutput style field handling to properly update with enum changes
+- 🔧 **CLI Argument Processing**: Improved stdin option parsing and default action handling reliability
+
+### Performance
+- ⚡ **Tree-sitter Optimization**: Refined structural compression algorithms for better performance and accuracy
+
+### Developer Experience
+- 🤖 **Automated Release Tools**: Added release scripts with interactive prompts and validation
+- 🔐 **PyPI Integration**: Streamlined publishing process with trusted publishing support
+- 📋 **Comprehensive Testing**: Extended test coverage for advanced CLI options and configuration scenarios
+
+## Previous Versions
+
+For versions prior to 0.3.0, please check the git history or GitHub releases page.
+
+---
+
+## How to Update This Changelog
+
+When preparing a release:
+
+1. Move items from `[Unreleased]` to the new version section
+2. Add the release date 
+3. Create a new `[Unreleased]` section for future changes
+4. Follow the categories: Added, Changed, Deprecated, Removed, Fixed, Security
+
+Example entry:
+```markdown
+## [1.2.3] - 2024-12-25
+
+### Added
+- New awesome feature that users will love
+
+### Fixed  
+- Critical bug that was causing issues
+```