docs: add changelog

Signed-off-by: Prajwol Amatya <prajwolamatya11@gmail.com>

Author: PrajwolAmatya

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Added
+
+### Fixed
+
+
 ## [2.1.0] - 2025-03-02
 
 ### Added