feat(inventory): editable vernacular (common) names

The "also known as" names were read-only; now they can be added and removed:
- Repository: addVernacularName + removeVernacularName (soft delete);
  VarietyDetail.vernacularNames carries ids (new VernacularName model).
- Cubit: addVernacularName / removeVernacularName.
- Detail: deletable name chips + an "Add name" chip opening a small dialog;
  the section is always visible so names can be added when empty.

Tests: repo add/remove + widget add/remove. 44 green.

apps/app_seeds/lib/i18n/strings_es.g.dart

@@ -116,6 +116,7 @@ class _Translations$detail$es extends Translations$detail$en {
 	@override String get lots => 'Lotes';
 	@override String get noLots => 'Aún no hay lotes.';
 	@override String get names => 'También conocida como';
+	@override String get addName => 'Añadir nombre';
 	@override String get notes => 'Notas';
 	@override String get addLot => 'Añadir lote';
 	@override String get editLot => 'Editar lote';
@@ -473,6 +474,7 @@ extension on TranslationsEs {
 			'detail.lots' => 'Lotes',
 			'detail.noLots' => 'Aún no hay lotes.',
 			'detail.names' => 'También conocida como',
+			'detail.addName' => 'Añadir nombre',
 			'detail.notes' => 'Notas',
 			'detail.addLot' => 'Añadir lote',
 			'detail.editLot' => 'Editar lote',