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/validator/es/lib/isSemVer.js

@@ -0,0 +1,14 @@
+import assertString from './util/assertString';
+import multilineRegexp from './util/multilineRegex';
+
+/**
+ * Regular Expression to match
+ * semantic versioning (SemVer)
+ * built from multi-line, multi-parts regexp
+ * Reference: https://semver.org/
+ */
+var semanticVersioningRegex = multilineRegexp(['^(0|[1-9]\\d*)\\.(0|[1-9]\\d*)\\.(0|[1-9]\\d*)', '(?:-((?:0|[1-9]\\d*|\\d*[a-z-][0-9a-z-]*)(?:\\.(?:0|[1-9]\\d*|\\d*[a-z-][0-9a-z-]*))*))', '?(?:\\+([0-9a-z-]+(?:\\.[0-9a-z-]+)*))?$'], 'i');
+export default function isSemVer(str) {
+  assertString(str);
+  return semanticVersioningRegex.test(str);
+}