ENH: Environment.create_ensemble method

[Gui-FernandesBR]

Describe the solution you'd like

Imagine you have multiple atmospheric profiles (pressure, temperature, wind_x, wind_y) for a single location. We want to build a netCDF4 dataset that:

• Combines all the profiles
• Has metadata describing all its variables and parameters
• Can be exported to a .nc file
• Can be loaded as an "ensemble" file in the Environment class, and the Enviroment object should work exactly as if it had been imported using "GEFS" or other Ensemble forecast models.

Additional context

This feature can help us to vary wind conditions within Monte Carlo simulations, as we would be able to import several user-defined atmospheric profiles at once.