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

apps/e2e/tests/healthcheck.spec.ts

@@ -4,7 +4,7 @@ import { expect, test } from '@playwright/test';
 
 test.describe('Healthcheck endpoint', () => {
   test('returns healthy status', async ({ request }) => {
-    const response = await request.get('/healthcheck');
+    const response = await request.get('/api/healthcheck');
 
     expect(response.status()).toBe(200);