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/_lib/assign/index.js

@@ -0,0 +1,24 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = assign;
+
+function assign(target, dirtyObject) {
+  if (target == null) {
+    throw new TypeError('assign requires that input parameter not be null or undefined');
+  }
+
+  dirtyObject = dirtyObject || {};
+
+  for (var property in dirtyObject) {
+    if (dirtyObject.hasOwnProperty(property)) {
+      target[property] = dirtyObject[property];
+    }
+  }
+
+  return target;
+}
+
+module.exports = exports.default;