feat(privacy): migrate privacy policies to product subdomains

Consolidate privacy policies per-subdomain:
- Migrate Gaze and Life and Lineage privacy policies verbatim from the
  legacy /privacy-policy/* routes to their subdomain paths
  (gaze.freno.me/privacy, lineage.freno.me/privacy), and replace the old
  routes with 308 permanent redirects to preserve SEO equity and stable
  link resolution.
- Add net-new privacy policies for the InputHalo and Nessa subdomains.
- Update the contact page link to point at the Lineage subdomain privacy
  policy.

src/routes/contact.tsx

@@ -331,7 +331,7 @@ export default function ContactPage() {
                 <div class="pb-2">
                   You can find the entire privacy policy{" "}
                   <A
-                    href="/privacy-policy/life-and-lineage"
+                    href="https://lineage.freno.me/privacy"
                     class="text-blue underline-offset-4 hover:underline"
                   >
                     here