feat(plot): PUBLISH opens the batch plot of the drawing's layouts

PUBLISH now runs what PRINTALL does: pick the layouts, each plotted with
its own page setup, into one multi-page PDF or to the printer.

Refs #1124

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/app/commands/mod.rs

@@ -490,6 +490,7 @@ inventory::submit!(crate::command::CommandRegistration {
         "EXPORTPDF",
         "EXPORTSVG",
         "PRINTALL",
+        "PUBLISH",
         "DDIM",
         // Inquiry: list the whole drawing database.
         "DBLIST",