Next.js Supabase V3 (#463)

Version 3 of the kit:
- Radix UI replaced with Base UI (using the Shadcn UI patterns)
- next-intl replaces react-i18next
- enhanceAction deprecated; usage moved to next-safe-action
- main layout now wrapped with [locale] path segment
- Teams only mode
- Layout updates
- Zod v4
- Next.js 16.2
- Typescript 6
- All other dependencies updated
- Removed deprecated Edge CSRF
- Dynamic Github Action runner

docs/recipes/personal-accounts-only.mdoc

@@ -0,0 +1,18 @@
+---
+status: "published"
+title: 'Disabling Team Accounts in Next.js Supabase'
+label: 'Disabling Team Accounts'
+order: 
+description: 'Learn how to disable team accounts in the Next.js Supabase Turbo SaaS kit and only allow personal accounts'
+---
+
+Disabling team accounts and only allowing personal accounts is a common requirement for B2C SaaS applications.
+
+To do so, you can tweak the following environment variables:
+
+```bash
+NEXT_PUBLIC_ENABLE_TEAM_ACCOUNTS=false
+NEXT_PUBLIC_ENABLE_TEAM_ACCOUNTS_BILLING=false
+```
+
+That's it! Team account UI components will be hidden, and users will only be able to access their personal account.