Added CHANGELOG.md 📝

Author: MarketingPip

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [1.0.0] - (Oct 7, 2024)
+
+Initial release of `ctree.js`
+
+<!--
+These Markdown anchors provide a link to the diff for each release. They should be
+updated any time a new release is cut.
+-->
+[1.0.0]: /v1.0.0