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-report-system/node_modules/deepmerge/rollup.config.js

@@ -0,0 +1,22 @@
+import resolve from 'rollup-plugin-node-resolve'
+import commonjs from 'rollup-plugin-commonjs'
+import pkg from './package.json'
+
+export default {
+	input: `index.js`,
+	plugins: [
+		commonjs(),
+		resolve(),
+	],
+	output: [
+		{
+			file: pkg.main,
+			format: `cjs`
+		},
+		{
+			name: 'deepmerge',
+			file: 'dist/umd.js',
+			format: `umd`
+		},
+	],
+}