chore: add CHANGELOG.md to document project changes and adhere to versioning standards

Author: tumf

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).
+
+## [1.0.2] - 2024-12-18
+
+### Added
+- Input/output redirection support in ShellExecutor
+- Pipeline execution capabilities
+- Process communication timeout handling
+- Directory path validation
+
+### Changed
+- Improved process cleanup mechanisms
+- Enhanced test configuration and organization
+- Standardized error handling across the codebase
+- Updated MCP dependency to version 1.1.2
+
+### Fixed
+- Proper timeout handling in process communication
+- Edge case handling in shell command execution
+- Warning suppression for cleaner output
+- Pipeline command parsing and execution
+
+### Security
+- Enhanced directory permission validation
+- Improved command validation and sanitization
+
+## [1.0.1] - 2024-12-12
+
+### Added
+- Server version display in startup logs
+
+### Changed
+- Updated version management system
+
+## [1.0.0] - 2024-12-12
+
+### Added
+- Initial release
+- Basic shell command execution via MCP protocol
+- Command whitelisting functionality
+- Standard input support
+- Command execution timeout control
+- Working directory specification
+- Comprehensive output handling (stdout, stderr, status)
+- Shell operator validation
+- Basic security measures
+- GitHub Actions workflows for testing and publishing