feat(website): add Nuxt 4 marketing landing page

New standalone apps/website (Nuxt 4) serving the public marketing site at
dezky.local / www.dezky.local. The customer portal moves off the root domain
to app.dezky.local only.

Landing page ported from the Dezky design handoff: light theme, Danish
default, hero variant A, with a working da/en toggle. Self-contained colour
system threaded through components (utils/landingTokens.ts), full bilingual
copy (utils/landingCopy.ts), and shared state (composables/useLanding.ts).
Sections live under components/landing/* with the Node logo under
components/brand/*.

Wired into docker-compose (website service, volume, Traefik labels, network
aliases) and bootstrap.sh (hosts list + service URLs).

apps/website/layouts/default.vue

@@ -0,0 +1,17 @@
+<template>
+  <div class="site">
+    <slot />
+  </div>
+</template>
+
+<!--
+  Minimal marketing-site layout. Intentionally bare — the Claude design
+  handoff for the landing page will introduce the real header/footer chrome.
+-->
+<style scoped>
+.site {
+  min-height: 100vh;
+  display: flex;
+  flex-direction: column;
+}
+</style>