feat(cli): Download path is familiar to users

[iancoleman]

Description

Instead of downloading to data_dir which is not a familiar directory to most users, change downloads to be saved to the regular familiar Downloads folder (eg the one most browsers use).

This is especially helpful when cleaning up a disk with low disk space, usually the first place to delete stuff is from the Downloads folder.

Summary generated by Reviewpad on 04 Dec 23 01:42 UTC

This pull request updates the CLI to use a more familiar download path for files. The patch modifies the files_cmds function in the mod.rs file to set the download directory to the system's default download directory. It also updates the download_files function to use the same download directory for file downloads.

[joshuef]

Can we rework this to avoid a potential panic with the expect here?

That appears to be the issue on the CI runs: https://github.com/maidsafe/safe_network/actions/runs/7102691487/job/19333646110?pr=1039 and https://github.com/maidsafe/safe_network/actions/runs/7102691508/job/19333645696?pr=1039

(Although it's not clear to me why this is failing to find the dir 🤔 , we'd still want to avoid a potential panic in the prod code eitherway)

[joshuef]

thanks for this @iancoleman 🙇

We'll need to remove the potential for a panic as tehre is now, and also the Memcheck test will need to be updated. (if you search for $CLIENT_DATA_PATH/downloaded_files that'll need to be switched up to ~/Downloads I expect)

[iancoleman]

@joshuef thanks for the feedback. I've incorporated those changes and I think this is good to go now.