Feature request - Automatically publish a new Gem/Template

[amzn-changml]

As a developer, I would like to have automation (Github Actions preferred) do the following once a primary branch is updated:

• Zip up a new or updated Gem or Template
• Create a new repo tag, and publish the zip file to Github Package for the repo
• Update the repo.json file if it's a new Gem with the sha256 hash
• Publish the repo,json to canonical.o3de.org