Perl documentation (including POD) with Markdown and Docbook

Introduction I have uploaded to CPAN some tooling modules which allow Perl documentation to be authored as Markdown files - or Docbook XML articles - then merged into source files as POD. They can also then be published as HTML to static sites such as Github pages or Cloudflare Workers. TL;DR here is an example of the end result - documention for the Cloudflare::API module created from the doc/ directory in the GitHub repository and POD for the command-line tool created from a Markdown file in the same repository.