The modularity team has agreed to investigate co-locating module-specific documentation with the module src code, while leaving WT API level docs in the src/docs folder.
This ticket is to look into options for how this content would be structured.

This ticket should:

• Review documentation options; Do we extend our use of Doxygen? Do we define a README.md file? Do we use an alternate file format? (AsciiDoc https://asciidoc.org/ and reStructedText https://docutils.sourceforge.io/rst.html have both been suggested)
• Demonstrate a proof of concept for the proposed implementation(s) that can be demonstrated to the team. This doesn't require documentation, just the folder structure and - if required by the implementation - an example of the docs compiling