EC-21: DOCS: Added changelog file for better clarity over changes.

Refers: Evercatch/evercatch-board#21

CHANGELOG.md

@@ -0,0 +1,13 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [0.0.2] - 2026-02-20
+### Added
+- Initial release of the SDK.
+- Added `.npmignore` to exclude Gitea config files.
+- Configured dual publishing (Gitea + Public NPM).
+
+## [0.0.1] - 2026-02-18
+### Added
+- Project initialization.