https://docs.wildfly.org/31/Installation_Guide.html very much needs a section talking about the wildfly-maven-plugin.

Pointing to the wildfly-maven-plugin documentation for some of the details is fine, but we should touch on the key points.

It should include a discussion of how to configure stability provisioning, aligning with what will be included per WFLY-19021 (https://github.com/wildfly/wildfly-proposals/pull/555/files#diff-c7fd6efd7e9286137019d5662b4fc110cea4554d8b405e5a92798e8f718be18bR274)

Incorporate the standard Galleon layers table.