wrapper-manager-fds/docs: add notes in manpage

subprojects/wrapper-manager-fds/docs/default.nix

@@ -161,7 +161,8 @@ in
         }
         ''
           mkdir -p $out/share/man/man5
-          asciidoctor --backend manpage ${./manpages/header.adoc} --out-file header.5
+          asciidoctor --attribute is-wider-scoped --backend manpage \
+            ${./manpages/header.adoc} --out-file header.5
           nixos-render-docs options manpage --revision ${releaseConfig.version} \
             --header ./header.5 --footer ${./manpages/footer.5} \
             ${wmOptionsDoc.optionsJSON}/share/doc/nixos/options.json \

subprojects/wrapper-manager-fds/docs/manpages/header.adoc

@@ -10,5 +10,21 @@
 
 wrapper-manager-configuration.nix - wrapper-manager configuration specification
 
+ifdef::is-wider-scoped[]
+== Additional notes
+
+If you've included env-specific integration wrapper-manager modules (e.g., NixOS, home-manager), there are additional things that are included.
+
+* The wider-scoped environment configuration is included as a module argument in each wrapper-manager package (i.e., `wrapper-manager.packages`).
+This is mainly useful to create a dynamic wrapper-manager package with different parameters when in NixOS, home-manager, or as standalone package.
++
+--
+* For NixOS integration, the NixOS configuration is available as `nixosConfig`.
+* For home-manager integration, `hmConfig` stores the home-manager configuration.
+--
+
+* Additional wrapper-manager documentation can be deployed with the wider environment.
+So far, there should be a manpage or an HTML document that can be enabled with `wrapper-manager.documentation.{manpage,html}.enable`.
+endif::[]
 
 == Options