Create the new parameter and update the input files for the use of a tighter formulation for storage assets

[datejada]

Create a new parameter use_binary_storage_method with three options:

• none: no extra constraints are included to avoid charging and discharging simultaneously.
• binary: it enables the binary variable and equations to avoid charging and discharging simultaneously in the storage asset.
• relaxed_binary: . it also enables the binary variable and equations to avoid charging and discharging simultaneously in the storage asset. Still, it relaxes the binary variable as a continuous variable within 0-1.