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

node_modules/is-promise/package.json

@@ -0,0 +1,30 @@
+{
+  "name": "is-promise",
+  "version": "4.0.0",
+  "description": "Test whether an object looks like a promises-a+ promise",
+  "main": "./index.js",
+  "scripts": {
+    "test": "node test"
+  },
+  "files": [
+    "index.js",
+    "index.mjs",
+    "index.d.ts"
+  ],
+  "exports": {
+    ".": [
+      {
+        "import": "./index.mjs",
+        "require": "./index.js",
+        "default": "./index.js"
+      },
+      "./index.js"
+    ]
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/then/is-promise.git"
+  },
+  "author": "ForbesLindesay",
+  "license": "MIT"
+}