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 sha256:28955c2485f0d0edea2a5c377ae85d8529831fa261bdbffc7034d989a2f0071f
-size 508429
+oid sha256:8a598e54a2457230c93edd09722c7b81dd6d7030a8717c4ccbfb39498201e9c3
+size 508173