Unit 8 CleanRL metadata

Fix README metadata tags for LunarLander-v3

Upload PPO training script

Upload trained PPO model on LunarLander-v3

Update README.md

Trained PPO agent

Update README.md

Update README.md

Update README.md

Trained PPO agent

Trained PPO agent

Update README.md

Upload PPO LunarLander-v3 trained agent

Upload PPO LunarLander-v3 trained agent

initial commit