how do I add a markdown plugin for syntax highlighting my code blocks?

Given the #498 was deemed to be out of scope, and this is a feature that I have needed a few times in the recent past already, it seems like this would be a really strong candidate for a plugin for iodide.

What is available to make this happen?

Start by reviewing issue #498 and the repository’s documented plugin or Markdown integration points. Clarify the extension point and expected syntax-highlighting behavior before estimating implementation; the issue does not name files, tests, or a defined completion condition.

Written by the indexing model from the issue text.