TF-657 Separate interactor/repository/datasource of identity

lib/features/manage_account/domain/state/create_new_identity_state.dart

@@ -1,6 +1,8 @@
 import 'package:core/core.dart';
 import 'package:jmap_dart_client/jmap/identities/identity.dart';
 
+class CreateNewIdentityLoading extends UIState {}
+
 class CreateNewIdentitySuccess extends UIState {
 
   final Identity newIdentity;

lib/features/manage_account/domain/state/delete_identity_state.dart

@@ -1,5 +1,7 @@
 import 'package:core/core.dart';
 
+class DeleteIdentityLoading extends UIState {}
+
 class DeleteIdentitySuccess extends UIState {
 
   DeleteIdentitySuccess();

lib/features/manage_account/domain/state/edit_identity_state.dart

@@ -1,5 +1,7 @@
 import 'package:core/core.dart';
 
+class EditIdentityLoading extends UIState {}
+
 class EditIdentitySuccess extends UIState {
 
   EditIdentitySuccess();

lib/features/manage_account/domain/state/get_all_identities_state.dart

@@ -2,6 +2,8 @@ import 'package:core/core.dart';
 import 'package:jmap_dart_client/jmap/core/state.dart';
 import 'package:jmap_dart_client/jmap/identities/identity.dart';
 
+class GetAllIdentitiesLoading extends UIState {}
+
 class GetAllIdentitiesSuccess extends UIState {
   final List<Identity>? identities;
   final State? state;