feat(www): add multigres private alpha go page (#51053)

## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?

- New go page at `/go/multigres-early-access` to request access to the
Multigres private alpha
- New thank-you page at `/go/multigres-early-access/thank-you`
- Both pages registered in `apps/www/_go/index.tsx`

## What is the current behavior?

There is no page to request access to the Multigres private alpha.

## What is the new behavior?

- Lead-gen page with a request form (work email and Supabase
organization slug)
- Form submissions write to a Notion waitlist database through
`crm.notion`
- Successful submissions redirect to the thank-you page
- Both pages are `noIndex`

## Additional context


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Added a Multigres private-alpha access page with details about the
alpha, links to its announcement and Supabase, and a form to submit an
email address and Supabase organization slug.
* Added a confirmation page shown after a successful access request,
with a link back to Supabase.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Ana <ana1337x@users.noreply.github.com>
Co-authored-by: Pamela Chia <pamelachiamayyee@gmail.com>

apps/www/_go/index.tsx

@@ -36,6 +36,8 @@ import amoe from './legal/amoe'
 import amoeThankYou from './legal/amoe-thankyou'
 import contestRules from './legal/contest-rules'
 import byocEarlyAccess from './pre-release/byoc-early-access'
+import multigresEarlyAccess from './pre-release/multigres-early-access'
+import multigresEarlyAccessThankYou from './pre-release/multigres-early-access-thank-you'
 import supabasePipelinesNewDestinations from './pre-release/supabase-pipelines-new-destinations'
 import supabasePipelinesNewDestinationsThankYou from './pre-release/supabase-pipelines-new-destinations-thank-you'
 import supabaseStripeProjects from './stripe-projects/supabase-stripe-projects'
@@ -47,6 +49,8 @@ const pages: GoPageInput[] = [
   byocEarlyAccess, // maintain until PM says to remove
   supabasePipelinesNewDestinations, // maintain while Pipelines destination early access is active
   supabasePipelinesNewDestinationsThankYou, // maintain while Pipelines destination early access is active
+  multigresEarlyAccess, // maintain while the Multigres private alpha is active
+  multigresEarlyAccessThankYou, // maintain while the Multigres private alpha is active
   amoe, // maintain forever
   amoeThankYou, // maintain forever
   contestRules, // maintain forever

apps/www/_go/pre-release/multigres-early-access-thank-you.tsx

@@ -0,0 +1,31 @@
+import type { GoPageInput } from 'marketing'
+
+const page: GoPageInput = {
+  template: 'thank-you',
+  slug: 'multigres-early-access/thank-you',
+  metadata: {
+    title: 'Multigres private alpha request received',
+    description: 'Thanks for requesting access to the Multigres private alpha.',
+    ogImage: '/images/blog/multigres/multigres.png',
+  },
+  hero: {
+    title: 'Thanks for your request',
+    subtitle: 'Private alpha',
+    description:
+      "We got your request for the Multigres private alpha. If your organization is selected, we'll reach out with next steps.",
+    ctas: [
+      {
+        label: 'Read the announcement',
+        href: '/blog/select-2026-scale-without-limits',
+        variant: 'secondary',
+      },
+      {
+        label: 'Back to Supabase',
+        href: '/',
+        variant: 'secondary',
+      },
+    ],
+  },
+}
+
+export default page

apps/www/_go/pre-release/multigres-early-access.tsx

@@ -0,0 +1,101 @@
+import type { GoPageInput } from 'marketing'
+
+const page: GoPageInput = {
+  template: 'lead-gen',
+  slug: 'multigres-early-access',
+  metadata: {
+    title: 'Multigres private alpha - Request access',
+    description:
+      'Request access to the Multigres private alpha on Supabase. Get multi-node high availability for Postgres, built by the team behind Vitess.',
+    ogImage: '/images/blog/multigres/multigres.png',
+  },
+  hero: {
+    title: 'Multigres on Supabase',
+    subtitle: 'Private alpha',
+    description:
+      'Get multi-node high availability for Postgres, built by the team behind Vitess. The private alpha is by invite.',
+    image: {
+      src: '/images/blog/multigres/multigres.png',
+      alt: 'Multigres',
+      width: 1200,
+      height: 800,
+    },
+    ctas: [
+      {
+        label: 'Request access',
+        href: '#form',
+        variant: 'primary',
+      },
+      {
+        label: 'Read the announcement',
+        href: '/blog/select-2026-scale-without-limits',
+        variant: 'secondary',
+      },
+    ],
+  },
+  sections: [
+    {
+      type: 'feature-grid',
+      className: 'border-y border-muted bg-surface-75 py-16 sm:py-24',
+      title: 'Multi-node high availability for Postgres',
+      description: 'It works with Supabase Auth, Storage, and Edge Functions.',
+      columns: 3,
+      items: [
+        {
+          title: 'Three nodes across zones',
+          description:
+            'Each Multigres cluster runs three nodes across availability zones in one region.',
+        },
+        {
+          title: 'Failover in seconds',
+          description:
+            'When a node fails, Multigres promotes a replica in seconds. Committed writes survive.',
+        },
+        {
+          title: 'No code changes',
+          description: "You don't need to change your application code to move to Multigres.",
+        },
+      ],
+    },
+    {
+      type: 'form',
+      id: 'form',
+      className: 'pt-4 pb-16 sm:pt-8 sm:pb-24',
+      title: 'Request access to the Multigres private alpha',
+      description:
+        "This form is for the Supabase-managed Multigres private alpha, not the open-source Multigres project. The alpha is for testing, not production use, and it comes with no guarantees on data, availability, or support. During the alpha, Realtime, point-in-time recovery, and logical replication aren't available, and our team adds read replicas and gateways for you. If your organization is selected, we'll reach out with next steps.",
+      fields: [
+        {
+          type: 'email',
+          name: 'email',
+          label: 'Email address',
+          placeholder: 'Work email',
+          required: true,
+        },
+        {
+          type: 'text',
+          name: 'org_slug',
+          label: 'Supabase organization slug',
+          placeholder: 'acme-inc',
+          description: 'Use the slug from your Supabase dashboard URL, for example /org/acme-inc.',
+          required: true,
+        },
+      ],
+      submitLabel: 'Request access',
+      successRedirect: '/go/multigres-early-access/thank-you',
+      disclaimer:
+        'By submitting this form, I confirm that I have read and understood the [Privacy Policy](https://supabase.com/privacy).',
+      crm: {
+        notion: {
+          database_id: 'e345167c699f459bad511549f6cb993a',
+          columnMap: {
+            email: 'Email',
+            org_slug: 'Organization Slug',
+          },
+        },
+      },
+    },
+  ],
+}
+
+export default page