Print error when using links in the wrong function

[morzahavi]

Proposal Summary

I would suggest adding an informative error when using links inside dataset.add_files() instead of using the appropriate dataset.add_external_files

Motivation

It took me some time to figure out whats wrong since I wasn't aware of the function for external files, and chat GPT was not clever enough to suggest it even though I used links in my question. The notification I got was something like "failed to add files..."

Related Discussion

If this continues a slack thread, please provide a link to the original slack thread.

[ainoam]

Thanks for suggesting @morzahavi - Would you care to put in a PR? any addition to streamline development is wholeheartedly welcome.

[morzahavi]

Thanks for suggesting @morzahavi - Would you care to put in a PR? any addition to streamline development is wholeheartedly welcome.

Added -> 50ad7b0

LMK if not clear