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/highlight.js/lib/languages/fix.js

@@ -0,0 +1,37 @@
+/*
+Language: FIX
+Author: Brent Bradbury <brent@brentium.com>
+*/
+
+/** @type LanguageFn */
+function fix(hljs) {
+  return {
+    name: 'FIX',
+    contains: [{
+      begin: /[^\u2401\u0001]+/,
+      end: /[\u2401\u0001]/,
+      excludeEnd: true,
+      returnBegin: true,
+      returnEnd: false,
+      contains: [
+        {
+          begin: /([^\u2401\u0001=]+)/,
+          end: /=([^\u2401\u0001=]+)/,
+          returnEnd: true,
+          returnBegin: false,
+          className: 'attr'
+        },
+        {
+          begin: /=/,
+          end: /([\u2401\u0001])/,
+          excludeEnd: true,
+          excludeBegin: true,
+          className: 'string'
+        }
+      ]
+    }],
+    case_insensitive: true
+  };
+}
+
+module.exports = fix;