MermaidModuleTypeSpec
From the Mermaid docs. Atlas won't validate any of these values, so you need to make sure they're in the right format. E.g. strokeDashArray as an array of integers like "5 5", strokeWidth as a pixel size ("5px") or an integer ("5"). See the above link for the expected formats.
Use put to insert any custom properties, but the below ones are all the available ones (AFAIK) as of writing this.