fix(www): redirect bare dashboard paths (#51052)

I added permanent www redirects for inbound Dashboard URLs that
currently reach the www 404 page. The project rule requires a path
segment and carries the full project suffix to Dashboard.

## To test

- In the www preview, open `/login`, `/support/new?category=billing`,
and `/account/tokens`. Each should redirect to its corresponding
`/dashboard` page and preserve the query string.
- Open `/project/<ref>` and
`/project/<ref>/database/migrations?source=docs`. Both should redirect
to the same path under `/dashboard`, preserving the suffix and query
string.
- Open bare `/project`. It should remain outside the new redirect rule.

## Linear

- fixes GROWTH-1302


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

## Summary by CodeRabbit

* **Other Changes**
* Visiting `/login`, `/support/new`, or `/account/tokens` now redirects
to the corresponding dashboard page.
  * Project links redirect to the matching dashboard project page.

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

apps/www/lib/redirects.js

@@ -1698,6 +1698,11 @@ module.exports = [
     source: '/sign-in',
     destination: 'https://supabase.com/dashboard/sign-in',
   },
+  {
+    permanent: true,
+    source: '/login',
+    destination: 'https://supabase.com/dashboard/sign-in',
+  },
   {
     permanent: true,
     source: '/sign-up',
@@ -1748,6 +1753,21 @@ module.exports = [
     source: '/projects',
     destination: 'https://supabase.com/dashboard/projects',
   },
+  {
+    permanent: true,
+    source: '/support/new',
+    destination: 'https://supabase.com/dashboard/support/new',
+  },
+  {
+    permanent: true,
+    source: '/account/tokens',
+    destination: 'https://supabase.com/dashboard/account/tokens',
+  },
+  {
+    permanent: true,
+    source: '/project/:path+',
+    destination: 'https://supabase.com/dashboard/project/:path+',
+  },
   // Reorganizing pooler docs:-----------------------------
 
   //external libraries