Add a Semantic Versioning Changelog to the Repository

[bhimrazy]

🚀 Feature

Title: Add a Semantic Versioning Changelog to the Repository

Description:

To improve project transparency and ease of tracking changes, we should add a dedicated CHANGELOG.md file following the Keep a Changelog standard with semantic versioning.

Motivation:

• A well-maintained changelog helps contributors and users quickly understand what has changed in each release.
• It documents notable features, bug fixes, and improvements in an organized manner.
• It would also help us include updates in release notes in a better and more consistent way.
• It enhances project maintainability and communication.

Suggested Structure:

# Changelog

All notable changes to this project will be documented in this file.

## [Unreleased]

## [1.0.0] - YYYY-MM-DD
### Added
- Initial release

Refs:

• pytorch lightning : https://github.com/Lightning-AI/pytorch-lightning/blob/master/src/lightning/pytorch/CHANGELOG.md
• torchmetrics: https://github.com/Lightning-AI/torchmetrics/blob/master/CHANGELOG.md

[deependujha]

I really like the concept of changelog. We should have it.