This commit introduces the preview functionality for the command. The preview displays a summary of what will be deleted before asking for user confirmation.
The feature is fully functional for the following flags:
- / : Correctly counts the number of data entries within the specified dataset.
- : Correctly counts the total number of datasets, data entries, and users in the system.
The logic for the flag is a work in progress. The current implementation uses a placeholder and needs a method to query a user directly by their ID to be completed.
