Create a changelog

[alicel]

The automation repo does not currently contain a changelog. We should create one that tracks all changes to it, grouping them into a section for each part of the automation.

The docs will link to this changelog as well as the proxy changelog.

This ticket is part of the first set of changes to improve the ZDM Versioning and support version-based documentation.

┆Issue is synchronized with this Jira Task by Unito
┆Components: Automation
┆Priority: Major