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/dev-tool/i18n/request.ts

@@ -0,0 +1,26 @@
+import { getRequestConfig } from 'next-intl/server';
+
+import account from '../../web/i18n/messages/en/account.json';
+import auth from '../../web/i18n/messages/en/auth.json';
+import billing from '../../web/i18n/messages/en/billing.json';
+import common from '../../web/i18n/messages/en/common.json';
+import marketing from '../../web/i18n/messages/en/marketing.json';
+import teams from '../../web/i18n/messages/en/teams.json';
+
+export default getRequestConfig(async () => {
+  return {
+    locale: 'en',
+    messages: {
+      common,
+      auth,
+      account,
+      teams,
+      billing,
+      marketing,
+    },
+    timeZone: 'UTC',
+    getMessageFallback(info) {
+      return info.key;
+    },
+  };
+});