Add changelog and initial Linux configuration files

Author: ehsanghaffar

CHANGELOG.md

@@ -0,0 +1,21 @@
+# 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).
+
+## [1.0.0] - 2025-11-20
+
+### Added
+- Initial release
+- Basic Linux distribution build from scratch
+- Linux kernel compilation
+- BusyBox integration
+- Syslinux bootloader
+- Basic init system
+- Docker build support
+- ISO image generation
+
+[Unreleased]: https://github.com/yourusername/handbuilt-linux/compare/v1.0.0...HEAD
+[1.0.0]: https://github.com/yourusername/handbuilt-linux/releases/tag/v1.0.0