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/shebang-regex/index.d.ts

@@ -0,0 +1,22 @@
+/**
+Regular expression for matching a [shebang](https://en.wikipedia.org/wiki/Shebang_(Unix)) line.
+
+@example
+```
+import shebangRegex = require('shebang-regex');
+
+const string = '#!/usr/bin/env node\nconsole.log("unicorns");';
+
+shebangRegex.test(string);
+//=> true
+
+shebangRegex.exec(string)[0];
+//=> '#!/usr/bin/env node'
+
+shebangRegex.exec(string)[1];
+//=> '/usr/bin/env node'
+```
+*/
+declare const shebangRegex: RegExp;
+
+export = shebangRegex;