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/isDecimal.js

@@ -0,0 +1,22 @@
+import merge from './util/merge';
+import assertString from './util/assertString';
+import includes from './util/includesArray';
+import { decimal } from './alpha';
+function decimalRegExp(options) {
+  var regExp = new RegExp("^[-+]?([0-9]+)?(\\".concat(decimal[options.locale], "[0-9]{").concat(options.decimal_digits, "})").concat(options.force_decimal ? '' : '?', "$"));
+  return regExp;
+}
+var default_decimal_options = {
+  force_decimal: false,
+  decimal_digits: '1,',
+  locale: 'en-US'
+};
+var blacklist = ['', '-', '+'];
+export default function isDecimal(str, options) {
+  assertString(str);
+  options = merge(options, default_decimal_options);
+  if (options.locale in decimal) {
+    return !includes(blacklist, str.replace(/ /g, '')) && decimalRegExp(options).test(str);
+  }
+  throw new Error("Invalid locale '".concat(options.locale, "'"));
+}