Add `agent.pt` and tag the environment

This commit adds a model that is compatible with the 🥇 [Open RL Leaderboard](https://huggingface.co/spaces/open-rl-leaderboard/leaderboard) 🥇.

agent.pt

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f22706ddd5ff20d86d265eefa9aba0ce48808782238e433528d85be7bac7165a
-size 28838
+oid sha256:6396578a0e12d8e562d97678d533b2a2eed2763861939c4145567d2752d38d81
+size 30218