add a CI job to generate headers when the XML file changes

It would be useful to have a CI job that generates headers. This would not need to be done for all changes, only when the XML file is modified. Ideally, this would upload the generated artifacts somewhere so they could be inspected.

The issue names no source file, test, or CI entry point. Start by locating the XML-to-header generation flow and existing CI configuration; done means the job runs when the XML changes and makes the generated artifacts available for inspection.

Written by the indexing model from the issue text.