Specifications in documentation : difficulty_levels and GridStateFromFileWithForecasts

[mariegirod]

Documentation issue description

Hello,
There are two points in the documentation that could be clearer.

1. What parameters should be in the difficulty_levels.json file?

2. The description of the class grid2op.Chronics.GridStateFromFileWithForecasts is as follows: "Forecast are also read from a file. For this class, only 1 forecast per timestep is read. The “forecast” present in the file at row $i$ is the one available at the corresponding time step, so valid for the grid state at the next time step."

When you say there is 1 forecast per timestep, do you mean there is one forecast timestep or one forecast file with possibly several timesteps?

Suggested modifications

For issue 1, I would suggest including an example of a difficulty_levels.json file.
For issue 2, it would be useful to clarify whether the forecast for separate timesteps are read in separate files, or if forecasts for all timesteps are in the same file?

Thank you.