WANDB support

[CHeesetoucher2]

Would be cool to visualize data from runs on wandb, such as checkpoint times, distance drives, graph over speed, time to finish map etc etc etc

[yannbouteiller]

Hi, there is already some basic support for wandb, but probably we can implement a more clever way of sending environment-specifific metrics, like putting these in a special entry of the info dict ?

Distance drive and time to finish map can already be inferred from the reward graph and the episode duration graph.

[CHeesetoucher2]

Oh missed that, but would be cool with more stats