TF-3040 Create public_asset feature

lib/features/public_asset/domain/exceptions/public_asset_exceptions.dart

@@ -0,0 +1,15 @@
+class UnsupportedCapabilityException implements Exception {
+  const UnsupportedCapabilityException();
+}
+
+class CannotCreatePublicAssetException implements Exception {
+  const CannotCreatePublicAssetException();
+}
+
+class CannotDestroyPublicAssetException implements Exception {
+  const CannotDestroyPublicAssetException();
+}
+
+class CannotUpdatePublicAssetException implements Exception {
+  const CannotUpdatePublicAssetException();
+}

lib/features/public_asset/domain/repository/public_asset_repository.dart

@@ -0,0 +1,34 @@
+import 'package:jmap_dart_client/jmap/account_id.dart';
+import 'package:jmap_dart_client/jmap/core/id.dart';
+import 'package:jmap_dart_client/jmap/core/session/session.dart';
+import 'package:jmap_dart_client/jmap/identities/identity.dart';
+import 'package:jmap_dart_client/jmap/mail/extensions/public_asset/public_asset.dart';
+
+abstract class PublicAssetRepository {
+  Future<List<PublicAsset>> getPublicAssetsFromIds(
+    Session session,
+    AccountId accountId,
+    {required List<Id> publicAssetIds}
+  );
+
+  Future<PublicAsset> createPublicAsset(
+    Session session,
+    AccountId accountId,
+    {
+      required Id blobId,
+      required IdentityId? identityId
+    }
+  );
+
+  Future<void> deletePublicAssets(
+    Session session,
+    AccountId accountId,
+    {required List<Id> publicAssetIds}
+  );
+
+  Future<void> updatePublicAssets(
+    Session session,
+    AccountId accountId,
+    {required List<PublicAsset> publicAssets}
+  );
+}