Dash: DIN 1451 opt-in per widget (hudFont), GNSS compass, rei by default; widget catalogue

From smart-serow: the DIN 1451 face (Alte DIN 1451 Mittelschrift, via gps-speedo)
and GpsCompass. A cosmetic font is opt-in: widgets name hudFont in their own
TextStyle, the rest keeps the basic font (CJK). Boxes and telltales shrink long
labels instead of wrapping. Telltale and Reading get their own files;
lib/README.md catalogues folders and widgets like smart-serow's.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DDwfd6Ki8UfG4hK6W5YpJz

lib/widgets/whiskey_mark.dart

@@ -64,6 +64,7 @@ class WhiskeyMark extends StatelessWidget {
                 Text(
                   'Roll: ${_formatAngle(roll)}',
                   style: TextStyle(
+                    fontFamily: hudFont,
                     fontSize: fontSize * 0.5,
                     fontWeight: FontWeight.w400,
                     fontFeatures: const [FontFeature.tabularFigures()],
@@ -74,6 +75,7 @@ class WhiskeyMark extends StatelessWidget {
                 Text(
                   'Pitch: ${_formatAngle(pitch)}',
                   style: TextStyle(
+                    fontFamily: hudFont,
                     fontSize: fontSize * 0.5,
                     fontWeight: FontWeight.w400,
                     fontFeatures: const [FontFeature.tabularFigures()],
@@ -87,6 +89,7 @@ class WhiskeyMark extends StatelessWidget {
             Text(
               'Attitude',
               style: TextStyle(
+                fontFamily: hudFont,
                 fontSize: fontSize * 0.8,
                 fontWeight: FontWeight.w400,
                 color: theme.subdued,