feat: Passwordless cross-device authentication

- Arkitektur: docs/auth/passwordless-architecture.md
- Backend: iom/quixzoom-auth-service/ (FastAPI + Redis)
- Webb: quixzoom-market-pages/se/login/ (QR-kod + polling)
- App: iom/quixzoom-app/src/features/auth/ (push + deep links)

Flöde: QR-kod → app-godkännande → webb-inloggad

landvex/node_modules/date-fns/esm/_lib/setUTCISODay/index.js

@@ -0,0 +1,22 @@
+import toInteger from "../toInteger/index.js";
+import toDate from "../../toDate/index.js";
+import requiredArgs from "../requiredArgs/index.js"; // This function will be a part of public API when UTC function will be implemented.
+// See issue: https://github.com/date-fns/date-fns/issues/376
+
+export default function setUTCISODay(dirtyDate, dirtyDay) {
+  requiredArgs(2, arguments);
+  var day = toInteger(dirtyDay);
+
+  if (day % 7 === 0) {
+    day = day - 7;
+  }
+
+  var weekStartsOn = 1;
+  var date = toDate(dirtyDate);
+  var currentDay = date.getUTCDay();
+  var remainder = day % 7;
+  var dayIndex = (remainder + 7) % 7;
+  var diff = (dayIndex < weekStartsOn ? 7 : 0) + day - currentDay;
+  date.setUTCDate(date.getUTCDate() + diff);
+  return date;
+}