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/buffer-from/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "buffer-from",
+  "version": "1.1.2",
+  "license": "MIT",
+  "repository": "LinusU/buffer-from",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "test": "standard && node test"
+  },
+  "devDependencies": {
+    "standard": "^12.0.1"
+  },
+  "keywords": [
+    "buffer",
+    "buffer from"
+  ]
+}