Add GET route to return app vAdd GET /version route to provide application version and timestampersion and timestamp

src/app/version/route.ts

@@ -0,0 +1,9 @@
+import { NextResponse } from 'next/server';
+
+export async function GET() {
+  const version = process.env.npm_package_version ?? 'unknown';
+  return NextResponse.json({
+    version,
+    timestamp: new Date().toISOString(),
+  });
+}