docs: SSR overhaul combined client page PoC (supabase#38405)

* Draft begins

* Starte SvelteKit

* Changes

* Consolidate creating a client

* Final draft

* Update apps/docs/content/guides/auth/server-side/creating-a-client.mdx

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update apps/docs/content/guides/auth/server-side/creating-a-client.mdx

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Rework and simplify

* Update apps/docs/content/guides/auth/server-side/creating-a-client.mdx

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update apps/docs/content/guides/auth/server-side/creating-a-client.mdx

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Update apps/docs/content/guides/auth/server-side/creating-a-client.mdx

Co-authored-by: Charis <[email protected]>

* improve spacing

* last

* Simplify example

* Prettier

* Fix hono, remove old pages, and add redirects

* Remove from menu

* Update apps/docs/content/guides/auth/server-side/creating-a-client.mdx

Co-authored-by: Charis <[email protected]>

* Changes

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Charis <[email protected]>
Co-authored-by: Alan Daniel <[email protected]>

Author: 4 people

apps/docs/components/Navigation/NavigationMenu/NavigationMenu.constants.ts

@@ -712,12 +712,6 @@ export const auth: NavMenuConstant = {
           name: 'Server-Side Rendering',
           url: '/guides/auth/server-side',
           items: [
-            { name: 'Overview', url: '/guides/auth/server-side' },
-            { name: 'Next.js guide', url: '/guides/auth/server-side/nextjs' },
-            {
-              name: 'SvelteKit guide',
-              url: '/guides/auth/server-side/sveltekit' as `/${string}`,
-            },
             { name: 'Creating a client', url: '/guides/auth/server-side/creating-a-client' },
             {
               name: 'Migrating from Auth Helpers',