feat: can migrate identity to external address

assets/translations/en.json

assets/translations/es.json

assets/translations/fr.json

integration_test/duniter/data/gecko_data.json

lib/models/migrate_wallet_checks.dart

lib/providers/my_wallets.dart

lib/providers/search.dart

lib/providers/substrate_sdk.dart

lib/providers/wallets_profiles.dart

lib/screens/myWallets/import_g1_v1.dart

lib/screens/myWallets/migrate_identity.dart

lib/screens/search.dart

lib/screens/settings.dart