Integration: Czech, German and Russian for Quit DesignCraft (#544 × cs/de/ru catalogs)

The catalogs that #544's branch doesn't have get the new menu label (machine-translated).

crates/ui-egui/src/i18n/cs.rs

@@ -16,6 +16,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("New Document…", "Nový dokument…"),
     ("Open…", "Otevřít…"),
     ("Close", "Zavřít"),
+    ("Quit DesignCraft", "Ukončit DesignCraft"),
     ("Save", "Uložit"),
     ("Save As…", "Uložit jako…"),
     ("Save a Copy…", "Uložit kopii…"),

crates/ui-egui/src/i18n/de.rs

@@ -16,6 +16,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("New Document…", "Neues Dokument …"),
     ("Open…", "Öffnen …"),
     ("Close", "Schließen"),
+    ("Quit DesignCraft", "DesignCraft beenden"),
     ("Save", "Speichern"),
     ("Save As…", "Speichern unter …"),
     ("Save a Copy…", "Kopie speichern …"),

crates/ui-egui/src/i18n/ru.rs

@@ -18,6 +18,7 @@ pub(super) const TABLE: &[(&str, &str)] = &[
     ("New Document…", "Новый документ…"),
     ("Open…", "Открыть…"),
     ("Close", "Закрыть"),
+    ("Quit DesignCraft", "Выйти из DesignCraft"),
     ("Save", "Сохранить"),
     ("Save As…", "Сохранить как…"),
     ("Save a Copy…", "Сохранить копию…"),