Proposed CHANGELOG.md file

[riverma]

Purpose

• New CHANGELOG.md file format to help provide history of significant changes for users / devs
  • Why a CHANGELOG when you have packaged releases? Packaging systems come and go, but a changelog is for the long-term.
  • Suggested update strategy is: https://semver.org whenever committed to main branch
• Leveraging https://keepachangelog.com/en/1.0.0/ format
• ⚠ NOTE: this is a DRAFT pull request, please commit to this PR branch with your existing release information to the changelog before merging

Proposed Changes

• [ADD] CHANGELOG.md file with sample content

Testing

• For live example, see: https://github.com/olivierlacan/keep-a-changelog/blob/main/CHANGELOG.md