This wrapper function loads all observation sheets (sheets named "data_*") and associated metadata
(e.g., "placette" and "modalite" sheets) from the Excel file into a user_data R6 object.
It updates both obs_data and metadata accordingly.
This wrapper function loads all observation sheets (sheets named "data_*") and associated metadata
(e.g., "placette" and "modalite" sheets) from the Excel file into a user_data R6 object.
It updates both obs_data and metadata accordingly.