Restores a previously saved 'BioThermR' object or a list of objects from a .rds file.
This function is the counterpart to save_biothermr and allows you to
resume analysis from a saved checkpoint.
Value
A single 'BioThermR' object or a list of 'BioThermR' objects, depending on the structure of the saved data.
Details
Upon loading, the function performs an automatic validation check to ensure the file contains a valid 'BioThermR' class instance (or a list of them). It provides feedback to the console regarding the type and quantity of objects loaded.