feat(website): SLA & cookie policy pages

Replace the /sla and /cookies stubs with real pages (da + en), matching
the DPA/terms/privacy layout. Drop both from the [slug].vue stub map.

- SLA: 99% uptime target framed as a transparency-backed commitment (no
  public service credits); contractual credits offered only via Enterprise
  agreements. Support first-response targets table; status-page reference.
- Cookie policy: strictly-necessary + language preference only, cookie-free
  analytics (Umami), no third-party tracking, "no banner needed"; cookie
  table; final (v1.0), no draft banner.

apps/website/pages/[slug].vue

@@ -17,8 +17,6 @@ const STUBS: Record<string, { legal: boolean }> = {
   status: { legal: false },
   docs: { legal: false },
   blog: { legal: false },
-  sla: { legal: true },
-  cookies: { legal: true },
 }
 
 const route = useRoute()