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_en.g.dart

@@ -162,6 +162,9 @@ class Translations$detail$en {
 	/// en: 'Also known as'
 	String get names => 'Also known as';
 
+	/// en: 'Add name'
+	String get addName => 'Add name';
+
 	/// en: 'Notes'
 	String get notes => 'Notes';
 
@@ -659,6 +662,7 @@ extension on Translations {
 			'detail.lots' => 'Lots',
 			'detail.noLots' => 'No lots yet.',
 			'detail.names' => 'Also known as',
+			'detail.addName' => 'Add name',
 			'detail.notes' => 'Notes',
 			'detail.addLot' => 'Add lot',
 			'detail.editLot' => 'Edit lot',