feat(locale): persist household and member preferences

packages/domain/src/index.ts

@@ -2,6 +2,7 @@ export { BillingPeriod } from './billing-period'
 export { DOMAIN_ERROR_CODE, DomainError } from './errors'
 export { BillingCycleId, HouseholdId, MemberId, PurchaseEntryId } from './ids'
 export { CURRENCIES, Money } from './money'
+export { normalizeSupportedLocale, SUPPORTED_LOCALES } from './locale'
 export {
   Temporal,
   instantFromDatabaseValue,
@@ -13,6 +14,7 @@ export {
   nowInstant
 } from './time'
 export type { CurrencyCode } from './money'
+export type { SupportedLocale } from './locale'
 export type { Instant } from './time'
 export type {
   SettlementInput,