Workshop with details on how to use+integrate+modify Golden Pipeline

A very down-the-road idea but could be useful to build if this takes off.

May also be worthwhile to have a Workshop for deploying this via CDK. As the complexity of configuration grows, we'll inevitably have some features that can't be supported via one-click and will require people to use CDK to update/deploy the pipeline. We should have instructions for how to do this.

Example of a non-GP workshop: https://devops.awssecworkshops.com/

The issue names no files, tests, or entry points. Start by reviewing the repository's Golden Pipeline implementation and its CDK deployment entry points, then define the workshop scope for using, integrating, modifying, and deploying the pipeline. Done means the workshop provides complete instructions for those workflows, including configurations that require CDK.

Written by the indexing model from the issue text.