DWF and DGN underlays: attach, display, snaps, frames and references

DWFATTACH / -DWFATTACH and DGNATTACH / -DGNATTACH attach a DWF / DWFx sheet
or a DGN (V7 or V8) model with the reference's prompts; ATTACH routes the
file types to them. The sheet or model is read into vector paths, drawn as a
transparent underlay raster (contrast, fade, monochrome and background
adjustment apply) and offers its geometry to object snaps. Definitions are
kept in ACAD_DWFDEFINITIONS / ACAD_DGNDEFINITIONS, the External References
palette lists and reloads them, and image textures get line-keeping mip
levels so thin underlay lines stay visible when zoomed out.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

locales/ru-RU/opencadstudio.ftl

@@ -1141,6 +1141,10 @@ common =
     .opened-drawing-but-recent-copy-could-not-be-stored = Чертёж открыт, но не удалось сохранить недавнюю копию: __ocs_fmt_0__
     .select-pdf-underlay = { draw.select }: PDF · { properties.underlay }
     .pdf-files = { common.files } (PDF)
+    .dwf-files = DWF Files
+    .dgn-files = DGN Files
+    .select-dwf-file = Select DWF File
+    .select-dgn-file = Select DGN File
     .pdfattach = PDFATTACH: __ocs_fmt_0__
     .select-external-reference-file = { draw.select } · { properties.external-reference } · { common.files }
     .cad-files = { common.files } (CAD)
@@ -1502,6 +1506,8 @@ common =
     .value-1-layout-selected = Выбран 1 лист
     .layouts-selected = выбранных листов
     .pdf = PDF
+    .dwf = DWF
+    .dgn = DGN
     .select-the-layouts-to-output-each-page-is-printed-in-layout-mode = Выберите листы для вывода. Каждая страница печатается в режиме листа.
     .select-all-1fc9a3 = { common.select-all }
     .select-none = { draw.select }: { common.none-title-case }