Merge pull request #1798 from Pictus08/feat/autocad-pgp-ucs-follow

Import AutoCAD PGP aliases and support UCSFOLLOW workflows. The UCS
conflict keeps main's click-origin flow (axis preview, Enter accepts
the placed axes) and takes the PR's prompt and option keywords.

src/app/commands/styleprops.rs

@@ -1304,6 +1304,7 @@ impl OpenCADStudio {
                 if name.is_empty() || name == "?" {
                     self.command_line
                         .push_info(&super::plotvars::setvar_listing());
+                    self.command_line.push_info("SETVAR (view): UCSFOLLOW");
                     self.command_line
                         .push_info(&super::blockvars::setvar_listing());
                     self.command_line.push_info(