Update README.md

Author: seveibar

README.md

@@ -2,6 +2,9 @@
 
 [view online](https://dataset.autorouting.com) · [blog](https://blog.autorouting.com) · [discord](https://tscircuit.com/community/join-redirect) · [tscircuit](https://github.com/tscircuit/tscircuit) · [benchmarks](./BENCHMARKS.md)
 
+> [!WARNING]
+> This repository has been largely replaced by the [tscircuit-autorouter](https://github.com/tscircuit/tscircuit-autorouter)
+
 A dataset of autorouting problems for benchmarking 🥇, plus a ton of utilities 🔨 including a viewer and testing server
 for developing new autorouting algorithms.