The Remarkup Help page is currently pointing to a HTML page on we.phorge.it.
Because of this it can not be customized/extended by custom extensions.
This diff allows you to implement a RemarkupSyntaxDocumentationProvider interface
to your custom class, which will implement a getDocumentation method.
This getDocumentation should return the custom help text in Remarkup format.
This diff also contains some extra help for the cowsay and figlet interpreters.
The local URLs for the local references are:
- /reference/remarkup/
- /reference/cowsay/
- /reference/figlet/
Closes T15401