text: Title: Libdoc: Support documentation written with Markdown
  Body: It seems this was [discussed briefly back in 2016](https://github.com/robotframework/robotframework/issues/2476) but I wanted to see if there was any thoughts on supporting the Markdown format for Libdoc in 2015.
  
  With Markdown being the preferred(currently only?) markup [for copilot knowledge bases](https://docs.github.com/en/enterprise-cloud@latest/copilot/customizing-copilot/managing-copilot-knowledge-bases), this would be a helpful enhancement for anyone trying to leverage specific library documentation for their copilot code generation or autocompletes.
  
  Due to the complexity of the HTML of the libdoc outputs they don't seem to work through any HTML to Mardown conversion tools so perhaps a more simplified Libdoc HTML output would work as well?