Add Custom FrozenLakePlus Environment with Dynamic Slipperiness and Training/Evaluation Scripts #2148
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Description
This PR adds a custom [FrozenLakePlus] environment that extends Gymnasium’s FrozenLakeEnv with dynamic slipperiness, allowing the environment’s transition dynamics to change during an episode. It also includes scripts for training (train_agent.py), evaluation (eval_agent.py), and testing (test_frozenlake_plus.py) the environment and agent.
Motivation and Context
This change introduces a non-stationary RL benchmark for testing agent robustness to changing environment dynamics. It enables research and experimentation with agents in environments where the transition probabilities can change over time.