🧹 Moved Sb1 API to separate workspace and created common workspace

- Created common workspace
- Create Sparebank1Api workspace
- Moved logger to common
- Moved SB1 types to types.ts
- Logger will avoid duplicating first line when capturing console.logs
- Updated imports and added type keyword
- Added nonUniqueId type

packages/common/date.ts

@@ -0,0 +1,3 @@
+import { type Dayjs } from "dayjs"
+
+export const toISODateString = (day: Dayjs): string => day.format("YYYY-MM-DD")