feat(ground-suite): add local vehicle catalog

ground-suite/lib/features/vehicle_workspace/domain/vehicle_definition.dart

@@ -0,0 +1,27 @@
+/// Bundled profile image for a local vehicle definition.
+class VehicleCatalogMedia {
+  const VehicleCatalogMedia({required this.imageAssetPath});
+
+  final String imageAssetPath;
+}
+
+/// A reviewed vehicle definition that can own a Ground Suite workspace.
+///
+/// It is deliberately separate from platform identity, compatibility, and
+/// write authority reported by a future live vehicle source.
+class VehicleDefinition {
+  const VehicleDefinition({
+    required this.id,
+    required this.name,
+    required this.vehicleClass,
+    required this.supportedProfile,
+    required this.media,
+  });
+
+  /// Stable local identity for persistence and future build matching.
+  final String id;
+  final String name;
+  final String vehicleClass;
+  final String supportedProfile;
+  final VehicleCatalogMedia media;
+}