Select Color: Document and Color books tabs

Document tab: every concrete colour the drawing uses (objects, block
definitions and layers), found in one pass when the panel opens, as a
grid of swatches sortable by recently used, most used, colour and colour
number. The recently-used list is now kept per drawing, so the ribbon's
Recent row shows this drawing's colours.

Color books tab: load AutoCAD .acb colour books (remembered in the
settings on desktop), browse them page by page with the page strip,
search by name and see the RGB equivalent. A book colour is applied as
RGB plus its BOOK$NAME identity on objects and layers instead of
dropping the name.

Strings translated into all 22 locales.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013rGmDUNr1hUf4zo1X3dak8

src/app/view/mod.rs

@@ -2187,7 +2187,7 @@ bg={bg_ms:.1}ms n={view_count}"
                     &redo_labels,
                     self.win_size,
                     self.tabs[self.active_tab].is_start,
-                    &self.recent_colors,
+                    &self.tabs[self.active_tab].recent_colors,
                 )
                 .unwrap_or_else(|| iced::widget::Space::new().width(0).height(0).into())
         };