Add Hello World page at /hello route

Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>

src/AppRouter.tsx

@@ -1,6 +1,7 @@
 import { BrowserRouter, Route, Routes } from "react-router-dom";
 import { ScrollToTop } from "./components/ScrollToTop";
 
+import HelloWorld from "./pages/HelloWorld";
 import Index from "./pages/Index";
 import { NIP19Page } from "./pages/NIP19Page";
 import NotFound from "./pages/NotFound";
@@ -11,6 +12,7 @@ export function AppRouter() {
       <ScrollToTop />
       <Routes>
         <Route path="/" element={<Index />} />
+        <Route path="/hello" element={<HelloWorld />} />
         {/* NIP-19 route for npub1, note1, naddr1, nevent1, nprofile1 */}
         <Route path="/:nip19" element={<NIP19Page />} />
         {/* ADD ALL CUSTOM ROUTES ABOVE THE CATCH-ALL "*" ROUTE */}

src/pages/HelloWorld.tsx

@@ -0,0 +1,7 @@
+export default function HelloWorld() {
+  return (
+    <div className="flex min-h-screen items-center justify-center">
+      <h1 className="text-4xl font-bold">Hello World</h1>
+    </div>
+  );
+}