docs: licensing + changelog

Author: sim13pods

CHANGELOG.md

@@ -0,0 +1,22 @@
+# 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 uses SemVer-style release tags.
+
+## [Unreleased]
+
+### Added
+
+### Changed
+
+### Deprecated
+
+### Removed
+
+### Fixed
+
+### Security
+
+[Unreleased]: https://github.com/eoap/json-schema2salad/tree/main

README.md

@@ -18,4 +18,4 @@ pip install json-schema2salad
 
 ## License
 
-`json-schema2salad` is distributed under the terms of the [Apache-2.0](https://www.apache.org/licenses/LICENSE-2.0) license.
+[![Apache License, Version 2.0](https://img.shields.io/badge/license-Apache%20License%202.0-blue)](https://www.apache.org/licenses/LICENSE-2.0)