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).

scripts/bootstrap.sh

@@ -109,7 +109,9 @@ info "Step 3: Setting up /etc/hosts entries..."
 
 HOSTS_ENTRIES=(
     "dezky.local"
+    "www.dezky.local"
     "app.dezky.local"
+    "operator.dezky.local"
     "auth.dezky.local"
     "mail.dezky.local"
     "files.dezky.local"
@@ -241,6 +243,7 @@ echo "║                    Setup Complete                            ║"
 echo "╚══════════════════════════════════════════════════════════════╝"
 echo ""
 echo "Service URLs:"
+echo "  Website:          https://dezky.local"
 echo "  Portal:           https://app.dezky.local"
 echo "  Authentik (auth): https://auth.dezky.local"
 echo "  Mail (admin):     https://mail.dezky.local"