Setup an Antora docs site

Should contain at least:

* Our additional command line args `--status`, `--stop`
* Our system properties and environment vars defined in https://github.com/mvndaemon/mvnd/blob/master/common/src/main/java/org/jboss/fuse/mvnd/common/Environment.java#L37 ; Ideally auto-generated.

Start by reviewing the requested Antora docs site scope and the existing command-line arguments, especially --status and --stop. Read common/src/main/java/org/jboss/fuse/mvnd/common/Environment.java from the referenced line to identify the documented system properties and environment variables. Done means the site covers those arguments and variables, with generation automated if feasible.

Written by the indexing model from the issue text.