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
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-size 492897
+oid sha256:130610b2a05a0211f562e740faa56ea9cfaf91da0084cd97222a234e328d9960
+size 492941