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/floating-docs-navigation-button.tsx

@@ -0,0 +1,22 @@
+'use client';
+
+import { Menu } from 'lucide-react';
+
+import { Button } from '@kit/ui/button';
+import { useSidebar } from '@kit/ui/sidebar';
+
+export function FloatingDocumentationNavigationButton() {
+  const { toggleSidebar } = useSidebar();
+  return (
+    <Button
+      size="custom"
+      variant="custom"
+      className={
+        'bg-primary fixed right-5 bottom-5 z-10 h-16! w-16! rounded-full! lg:hidden'
+      }
+      onClick={toggleSidebar}
+    >
+      <Menu className={'text-primary-foreground size-6'} />
+    </Button>
+  );
+}