chore: add changelog file

Author: YogendraShelke

CHANGELOG.MD

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+# Changelog
+
+All notable changes to `mendix-native` package 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]
+
+## [0.1.2] - 2025-11-17
+
+- We upgraded mendix-native to use React Native’s New Architecture to improve performance and future compatibility.