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-report-system/node_modules/javascript-stringify/dist/index.d.ts

@@ -0,0 +1,11 @@
+import { ToString } from "./types";
+export interface Options {
+    maxDepth?: number;
+    maxValues?: number;
+    references?: boolean;
+    skipUndefinedProperties?: boolean;
+}
+/**
+ * Stringify any JavaScript value.
+ */
+export declare function stringify(value: any, replacer?: ToString | null, indent?: string | number | null, options?: Options): string | undefined;