Document Next.js version 15 requirement (#2540)

This pull request contains changes generated by Cursor background
composer.

Co-authored-by: Cursor Agent <[email protected]>

Author: imalsogreg

fern/01-guide/08-frameworks/01-react-nextjs/01-quick-start.mdx

@@ -4,6 +4,10 @@ title: React/Next.js Setup
 
 This guide walks you through setting up BAML with React/Next.js, leveraging Server Actions and React Server Components for optimal performance.
 
+<Note>
+**Requirements:** This integration requires **Next.js 15 or higher**.
+</Note>
+
 ## Example Usage
 
 BAML automatically generates a server action and React hook for your BAML functions, with built-in support for both streaming and non-streaming modes. For details on the generated hooks, see [Generated Hooks](/ref/baml_client/react-next-js/use-function-name-hook).

fern/01-guide/08-frameworks/01-react-nextjs/02-chatbot.mdx

@@ -13,7 +13,7 @@ In this tutorial, you'll build a real-time streaming chatbot using BAML React ho
 
 Before starting, ensure you have:
 - Completed the [Quick Start Guide](/guide/framework-integration/react-next-js/quick-start)
-- A Next.js project with BAML set up
+- A Next.js project (version 15 or higher) with BAML set up
 - An OpenAI API key
 
 ## Step 1: Define the Chat Function

typescript/packages/nextjs-plugin/README.md

@@ -2,6 +2,10 @@
 
 Next.js integration for BAML, providing seamless support for server components, server actions, and streaming responses.
 
+## Requirements
+
+- **Next.js 15 or higher**
+
 ## Installation
 
 ```bash