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/uuid/dist-node/sha1.js

@@ -0,0 +1,11 @@
+import { createHash } from 'node:crypto';
+function sha1(bytes) {
+    if (Array.isArray(bytes)) {
+        bytes = Buffer.from(bytes);
+    }
+    else if (typeof bytes === 'string') {
+        bytes = Buffer.from(bytes, 'utf8');
+    }
+    return createHash('sha1').update(bytes).digest();
+}
+export default sha1;