fix: Add a CHANGELOG.md (#64)

path/to/CHANGELOG.md

@@ -0,0 +1,14 @@
+# 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]
+
+- Initial release.
+
+## [v0.1.0] - 2023-10-01
+
+- Initial release with basic functionality.

path/to/CONTRIBUTING.md

@@ -0,0 +1,9 @@
+# Contributing
+
+We welcome contributions from the community! Please follow these guidelines:
+
+- **Update the CHANGELOG**: After each merge to `main`, update the `CHANGELOG.md` file in the `Unreleased` section with a summary of your changes, following the [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) format.
+- **Follow SemVer**: Ensure your changes align with our Semantic Versioning policy.
+- **Run tests**: Make sure your changes pass the existing test suite before submitting.
+
+Your contributions help keep our project transparent and easy to follow.