feat(WHE-18): implement money, billing period, and typed domain ids

packages/domain/src/index.ts

@@ -1 +1,13 @@
-export const domainReady = true
+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 type { CurrencyCode } from './money'
+export type {
+  SettlementInput,
+  SettlementMemberInput,
+  SettlementMemberLine,
+  SettlementPurchaseInput,
+  SettlementResult,
+  UtilitySplitMode
+} from './settlement-primitives'