Update React template docs URL to developer.playcanvas.com (#30)

* Initial plan

* Update React template docs URL from vercel to developer.playcanvas.com

Co-authored-by: abstrakt8 <68276899+abstrakt8@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: abstrakt8 <68276899+abstrakt8@users.noreply.github.com>

Author: Copilot

templates/react-ts/README.md

@@ -72,7 +72,7 @@ Run `npm run build` to generate a static production bundle in `dist/`. Deploy th
 ## Further Reading
 
 * [PlayCanvas Engine Docs](https://developer.playcanvas.com)
-* [PlayCanvas React Docs](https://playcanvas-react.vercel.app)
+* [PlayCanvas React Docs](https://developer.playcanvas.com/user-manual/react/)
 * [React Docs](https://react.dev/)
 * [Vite Docs](https://vitejs.dev/)
 * [TypeScript Handbook](https://www.typescriptlang.org/docs/)

templates/react-ts/src/App.tsx

@@ -19,7 +19,7 @@ function App() {
         <div className="grow">
           <header>
             <h1>PlayCanvas + React</h1>
-            <a href="https://playcanvas-react.vercel.app/docs" target="_blank">
+            <a href="https://developer.playcanvas.com/user-manual/react/" target="_blank">
               <img src={playcanvasLogo} className="playcanvas-logo logo" alt="PlayCanvas logo" />
             </a>
             <a href="https://react.dev" target="_blank">