Update READEME and cleanup folder

cooperative_cuisine/reinforcement_learning/README.md

...nt_learning/config/environment/environment_config_rl.yaml

...environment_config_rl_deterministic_order_generation.yaml

...nfig/environment/environment_config_rl_small_rewards.yaml

...tive_cuisine/reinforcement_learning/full_vectorization.py

cooperative_cuisine/reinforcement_learning/overcooked_ai.md

cooperative_cuisine/reinforcement_learning/tryout_pearl.py

...ive_cuisine/reinforcement_learning/visualization/.gitkeep

...inforcement_learning/visualization/model_small_rl_env.png