Adapted converter to get state and not environment

cooperative_cuisine/configs/layouts/rl/rl_small_salad.layout

cooperative_cuisine/counters.py

cooperative_cuisine/items.py

.../config/environment/overcooked-ai_environment_config.yaml

...tive_cuisine/reinforcement_learning/config/rl_config.yaml

cooperative_cuisine/reinforcement_learning/gym_env.py

...cement_learning/obs_converter/advanced_converter_array.py

...orcement_learning/obs_converter/advanced_converter_int.py

...ne/reinforcement_learning/obs_converter/base_converter.py

...forcement_learning/obs_converter/base_converter_onehot.py

...tive_cuisine/reinforcement_learning/train_single_agent.py