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

packages/i18n/src/locales.tsx

@@ -0,0 +1,16 @@
+import { defaultLocale } from './default-locale';
+
+/**
+ * @name locales
+ * @description Supported locales
+ * @type {string[]}
+ * @default [defaultLocale]
+ */
+export const locales: string[] = [
+  defaultLocale,
+  // Add other locales here as needed
+  // Example: 'es', 'fr', 'de', etc.
+  // Uncomment the locales below to enable them:
+  // 'es', // Spanish
+  // 'fr', // French
+];