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/web/app/[locale]/home/(user)/_components/home-page-header.tsx

@@ -0,0 +1,12 @@
+import { PageHeader } from '@kit/ui/page';
+
+export function HomeLayoutPageHeader(
+  props: React.PropsWithChildren<{
+    title: string | React.ReactNode;
+    description: string | React.ReactNode;
+  }>,
+) {
+  return (
+    <PageHeader description={props.description}>{props.children}</PageHeader>
+  );
+}