ATTDEF: dialog, -ATTDEF prompts, tag display, Properties and ribbon

Attribute Definition dialog and Edit Attribute Definition dialog, -ATTDEF
with the reference prompts and modes (AFLAGS), tag shown in the drawing,
justification-aware grips, reworked Properties with validation, Home Block
slide-out and Insert Block Definition panel, and the codec patch for
ATTDEF DXF output and the R2013+ solid wire cache.

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

src/app/text_inline.rs

@@ -155,6 +155,13 @@ impl super::OpenCADStudio {
             self.open_tolerance_dialog(Some(target));
             return iced::Task::none();
         }
+        if matches!(
+            self.tabs[i].scene.document.get_entity(target),
+            Some(EntityType::AttributeDefinition(_))
+        ) {
+            self.open_attdef_edit(target);
+            return iced::Task::none();
+        }
         // Snapshot what we need before borrowing `self` mutably to open.
         let Some(entity) = self.tabs[i].scene.document.get_entity(target) else {
             return iced::Task::none();