Backward compatibility

[Morphlng]

Hi! I'm glad to see the latest upgrade of MARLlib with update to date document. But I'm a bit confused about the relationship of these Api-based usage with previous console-based usage. So, I want to make sure something:

1. I don't see the main.py anymore, does this mean that the console-based usage is completely deprecated?
2. Besides the change of usage, is there any algorithm related improvement? (Is there a detailed version info?)
3. What is the relationship between previously required 4 config file and the new Api? Also, it seems like there are some new configurations, for example:

# build agent model based on env + algorithms + user preference
model = marl.build_model(env, mappo, {"core_arch": "mlp", "encode_layer": "128-256"})

# start training
mappo.fit(env, model, stop={"timesteps_total": 1000000}, checkpoint_freq=100, share_policy="group")

Is there a full document of what exactly can be configured? Or should I just refer to Ray's document?

[Theohhhu]

please refer to the version info and the doc related part.