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]/docs/_components/docs-card.tsx

@@ -0,0 +1,32 @@
+import Link from 'next/link';
+
+export function DocsCard({
+  title,
+  subtitle,
+  children,
+  link,
+}: React.PropsWithChildren<{
+  title: string;
+  subtitle?: string | null;
+  link: { url: string; label?: string };
+}>) {
+  return (
+    <Link href={link.url} className="flex flex-col">
+      <div
+        className={`hover:bg-muted/70 flex grow flex-col gap-y-0.5 rounded border p-4`}
+      >
+        <h3 className="mt-0 text-lg font-medium hover:underline dark:text-white">
+          {title}
+        </h3>
+
+        {subtitle && (
+          <div className="text-muted-foreground text-sm">
+            <p dangerouslySetInnerHTML={{ __html: subtitle }}></p>
+          </div>
+        )}
+
+        {children && <div className="text-sm">{children}</div>}
+      </div>
+    </Link>
+  );
+}