Merge pull request #1613 from ramox81/codex/sheet-set-manager

Sheet Set Manager, NEWSHEETSET / OPENSHEETSET and sheet set fields, with review fixes.

# Conflicts:
#	Cargo.lock
#	src/app/control/actions.rs
#	src/app/mod.rs
#	src/app/settings.rs
#	src/app/update/dialog.rs
#	src/app/update/file.rs
#	src/app/update/mod.rs
#	src/app/view/mod.rs
#	src/ui/dock.rs
#	src/ui/ribbon/mod.rs
#	src/ui/window/field_dialog.rs
#	src/ui/window/mod.rs

src/app/commands/display.rs

@@ -595,12 +595,6 @@ impl OpenCADStudio {
                     .push_info(crate::t!("TOOLPALETTES: Tool Palettes not yet implemented.").as_ref());
             }
 
-            // ── SHEETSET — not yet implemented ───────────────────────────────────
-            "SHEETSET" => {
-                self.command_line
-                    .push_info(crate::t!("SHEETSET: Sheet Set Manager not yet implemented.").as_ref());
-            }
-
             // ── XDATA — read/write extended entity data ──────────────────────────
             // XDATA LIST             — show all xdata records on selected entities
             // XDATA SET <app> <str>  — append a string xdata value for <app>