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/istanbul-lib-source-maps/lib/pathutils.js

@@ -0,0 +1,21 @@
+/*
+ Copyright 2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+
+const path = require('path');
+
+module.exports = {
+    isAbsolute: path.isAbsolute,
+    asAbsolute(file, baseDir) {
+        return path.isAbsolute(file)
+            ? file
+            : path.resolve(baseDir || process.cwd(), file);
+    },
+    relativeTo(file, origFile) {
+        return path.isAbsolute(file)
+            ? file
+            : path.resolve(path.dirname(origFile), file);
+    }
+};