[FEATURE] Add URL metadata like youtube-dl

[AttractLight]

Is the feature request related to a problem. Please describe it.

I have an issue when I want to know where a file was downloaded from.

Describe the solution you would like.

I would like streamrip to add URL metadata. youtube-dl (or maybe yt-dlp?) adds URL to the comment metadata when --add-metadata is specified. The WWW metadata would also be nice for such a URL.

Describe alternatives you've considered.

Currently streamrip supports {id} in folder_format. However, some of them seem to be internal identifiers. I don't even know if I can download with these ids on streamrip.

[nathom]

Try rip id on v2.