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/clean.js

@@ -0,0 +1,40 @@
+/*
+Language: Clean
+Author: Camil Staps <info@camilstaps.nl>
+Category: functional
+Website: http://clean.cs.ru.nl
+*/
+
+/** @type LanguageFn */
+function clean(hljs) {
+  return {
+    name: 'Clean',
+    aliases: [
+      'icl',
+      'dcl'
+    ],
+    keywords: {
+      keyword:
+        'if let in with where case of class instance otherwise ' +
+        'implementation definition system module from import qualified as ' +
+        'special code inline foreign export ccall stdcall generic derive ' +
+        'infix infixl infixr',
+      built_in:
+        'Int Real Char Bool',
+      literal:
+        'True False'
+    },
+    contains: [
+      hljs.C_LINE_COMMENT_MODE,
+      hljs.C_BLOCK_COMMENT_MODE,
+      hljs.APOS_STRING_MODE,
+      hljs.QUOTE_STRING_MODE,
+      hljs.C_NUMBER_MODE,
+      { // relevance booster
+        begin: '->|<-[|:]?|#!?|>>=|\\{\\||\\|\\}|:==|=:|<>'
+      }
+    ]
+  };
+}
+
+module.exports = clean;